The Seastar Pavilion back corridor was not designed for comfort. It was barely designed for humans. Maintenance lamps clung to the ceiling at regular intervals, each bulb tuned a fraction too cold, exaggerating every shadow and magnifying the paleness of the concrete walls. Even the air felt more functional than breathable, a blend of industrial cleaner and recirculated nothing shot through with the residual ozone of the event floor beyond.

  Tessa hunched beside Nadia, the two of them elbow to elbow in a dead spot between the storage closet and the corridor’s only real light source. Nadia balanced the evidence tablet on her left palm, thumb walking through the playback menu while her right hand sorted a grid of time stamped printouts on the floor. She had used a different color ink for each batch of evidence, and the squares of paper looked like forensic sudoku.

  Cal stood just behind them, back to the wall, pen uncapped and notebook open to a page already half filled with his blocky, unornamented handwriting. He had not said much since they left the café, but Tessa tracked his eyes over every detail. Never skipping, never scanning, just a steady mechanical sweep.

  Junie, somehow both vibrating with energy and perfectly still, perched on a crate labeled Event: Marinade Madness. Her knees were drawn up, hands clasped over them, eyes fixed on the tablet as if watching a particularly irritating magic trick.

  “You ever notice how every corridor in this place looks like the last ten minutes before a spaceship airlock opens?” she said. “Very retro futurism. Very you will not get paid enough for this.”

  Nadia did not bother looking up. “If we are lucky, no one gets sucked into space. If we are unlucky, we will have to explain this footage to a lawyer.”

  Junie made a small approving noise. “I just want it noted that you skipped a lawyer joke and went straight for the threat. Character development.”

  “Shh,” Tessa said, but gently.

  She watched the playback speed at the top of the screen.

  The corridor footage looked as miserable as the real thing. At 05:29, the lens picked up a blur, a figure moving too fast for the system frame rate. A bright stripe of color on the arm, a ghost trail behind. Nadia hit pause, then advanced frame by frame.

  “That is the orange,” Tessa said. “Run it again.”

  Nadia did, this time at half speed. The orange band flashed twice as the figure passed the maintenance door. There was a hitch in the step, then the outline bent sharply and vanished beyond the camera edge.

  Tessa frowned. “Can you freeze on the badge?”

  “I can freeze on the intent to badge,” Nadia replied, dry, then tapped the screen. “But this is the best the system will give us. See?”

  She zoomed in, and the image pixelated into a thumbprint sized chunk of color. Unmistakably orange, definitely not the navy blue of event staff.

  Junie let out a low whistle. “Guess the Pavilion did not spring for HD in the hallways. Tragic.”

  Cal leaned in, watching the playback loop twice more. “You said orange bands are Incubator cohort?”

  Junie nodded. “It is like an entire subculture. Interns, rotational volunteers, a couple of career experimenters. Orange means you are on the test cycle. Blue is Pavilion staff. Vendors usually get green, but only on event days.” She shrugged. “People with orange access move in packs unless they are running a protocol. Then they go solo.”

  “Is that an actual rule?” Tessa asked.

  “More like a tradition. If you see a solo orange at six a.m., they are either fixing something or breaking it. And sometimes those are the same job.”

  Nadia advanced the footage again, pausing just before the figure left the frame. “Does not look like a normal delivery or maintenance. No bin, no cart, nothing in the hands except.”

  She trailed off, tapping at the screen.

  Tessa leaned closer. “What is that on the left edge?”

  They all squinted. A white rectangle, smooth sided, no handle visible, maybe thirty centimeters tall. It was only visible for a single frame, then gone.

  Junie said, “That is a cooler. TimeSavr model, sponsor issue. They use them for rapid batch delivery. It has a digital lock and a temp chip, so even if you hijack it, you cannot fudge the record.”

  Cal wrote White Cooler, TimeSavr in his notebook, then underlined it.

  Tessa watched the frame a few more times. “Why deliver anything to this hallway? It is not a prep zone.”

  Nadia answered without looking up. “It is a shortcut to the east stairwell. If you want to skip the main corridor, you cut through here.”

  “Camera coverage?” Cal asked.

  Nadia flipped to the map overlay. “Blind spot at the bend, right past the maintenance closet. If you hug the wall, you are invisible for about four meters.”

  “Was that always the case?” Cal asked again, tone neutral.

  Junie took the tablet, then called up the last two weeks of footage. She scrolled through at high speed, watching for the white cooler or the orange band. “People use it, but almost always in pairs. It is a safety thing. They do not want to be accused of going off script, not with all the liability emails.” She slowed the scroll. “But see here. Same time slot every day, and always the same solo orange.”

  Tessa noted the badge time in her pad. “Anything else weird in the pattern?”

  Junie said, “Actually, yeah. The orange is always followed by a blue, maybe a minute later. It is almost synchronized. Like they are relaying.”

  Cal said, “Chain of custody, but for movement.”

  Nadia ran a thumb along the seam of the printout grid. “It gets weirder. I checked the badge logs for the same corridor access. The system redacts the orange band name every time.”

  She flipped a printout to the top of the pile. The cell for user ID was simply blank, with a line of asterisks.

  Junie squinted. “That is not a glitch. That is sponsor protocol. They run the test cycles with shadow badges, so if the experiment tanks, no one gets named in the review.”

  Tessa’s pencil hovered. “Are you kidding me?”

  Junie shook her head. “Every time Maplewick tries to run a human study, they write the approval to protect volunteers. Which is great if you are in a lawsuit, but less so if you are the target of an investigation.”

  Cal’s mouth pulled sideways. “Can we get the real badge list?”

  Nadia replied, “Not unless you have a County subpoena. Sponsor protocol means even the admin staff cannot see it.”

  Tessa set her pencil down and looked at the grainy freeze frame again. The orange band was thin and high on the wrist, with a black clasp and what looked like a barcode printed along one side.

  She said, “The clasp is new. Last cycle, they used fabric Velcro. Why change it?”

  Junie supplied, “After last year’s allergy incident, they went to anti tamper. If you pop it off, it snaps and the badge dies. Cheap, but not easy to fake. Or that is the idea.”

  Cal wrote Anti tamper clasp in his notes, then said, “Can we match the hand to a volunteer file?”

  Nadia glanced at the screen, then at her own phone. “Doubt it. It is intentionally anonymous. But if we can get a shot of the barcode, we might get a serial number.”

  “Run the footage at the highest zoom,” Tessa said.

  Nadia complied, but the pixels gave out before the camera could render the code.

  Junie tapped the printout stack. “If we cannot find the face, maybe we find the cooler.”

  Tessa’s mind spun through the last hour of event prep. “Where does the white cooler go?”

  Nadia ran a reverse search, watching for the same model. She caught it on a camera two floors down in a dead zone near the freight elevator.

  “That is staff access only,” Junie said, surprised. “Vendors cannot even get in that wing.”

  Tessa asked, “But orange bands can?”

  “Yes, if they are authorized for transit. Otherwise, the badge flags at the reader.” Junie looked thoughtful, then said, “It would take a signed override. Or a sponsor code.”

  Nadia navigated to the security app, but when she tried to access the badge logs for that sector, the screen flashed red: RESTRICTED: SPONSOR PROTOCOL.

  Cal wrote the phrase verbatim, all capitals, then underlined it three times. “There is your answer. The system is hiding the orange band activity.”

  Junie let out a low, impressed sound.

  Tessa rolled the pencil in her fingers, then tapped it on the screen. “But if it is all sponsor protocol, why even bother with cameras?”

  Nadia replied, “They want plausible deniability. If you catch someone, it is a rogue agent. If you do not, it is a clean run.”

  Cal said, “We need to check every staff log for that morning. Find the blue band that trailed the orange.”

  Junie got up, stretching her legs. “I will map out the route. If we are lucky, we catch them together at a crossover point.”

  If you spot this narrative on Amazon, know that it has been stolen. Report the violation.

  Nadia watched her go, then turned to Tessa. “You thinking what I am thinking?”

  “Whoever moved that cooler had a reason to keep it off the main floor.”

  “Which means it was not a normal sample. Could have been contaminated, or swapped for another batch.”

  Cal added, “Or a dummy run. If you want to test a process but not get caught, you run the cooler empty.”

  Tessa watched the white rectangle flicker in and out of view on the freeze frame. She had seen that shape before on sponsor delivery days, always handled like it contained evidence of a minor god.

  She said, “What is in the cooler matters. But who moved it matters more.”

  Nadia nodded. “I will run the badge sequence for every orange band in the system, even if the names are blanked. I can get serial numbers for the bands and look for a match.”

  Tessa watched the corridor footage one more time, this time focusing on the stride, the speed, the hesitation at the maintenance closet.

  She said, “Find out what is behind that door.”

  Nadia smiled. “Already requested the schematic.”

  Cal snapped his notebook closed. “Let us work the human angle. Someone will remember an orange moving solo at five thirty in the morning. Even if they are not supposed to.”

  Junie returned, holding a whiteboard marker and a scrap of recycled event map. She had drawn a shortcut between the corridor and the staff access. “There is a half meter gap in camera coverage if you duck the first turn. Smart if you want to be unobserved. Dumb if you think nobody is watching.”

  Tessa nodded. “Then we watch.”

  They set the plan. Nadia would reconstruct the movement of every orange band in the facility from two hours before the incident to two hours after. Cal would check the County records for any signed sponsor overrides in the same window. Junie would socialize, as only she could, and listen for rumors about the solo runner.

  Tessa would keep watching the white cooler.

  For the first time all day, she felt the case might be breakable.

  She picked up the next printout, turned it over, and started from the beginning.

  The shortcut corridor looked nothing like it did on the Pavilion event posters. Instead of being a clean artery between the main floor and the east stairwell, it was a warped underlit squeeze. One side was lined with battered delivery carts. The other was crammed with crates of folding chairs. The corridor bent twice, first at a shallow angle, then at a sharp ninety around a maintenance closet whose door had been repainted so many times its sign read Closet in three different fonts. The air was close, even with the event HVAC running high.

  Junie took point, the soles of her shoes sticking a little on the non slip tile. She held a dry erase marker and a crumpled event flyer, using the blank side to sketch out the layout as they went. “Officially, this hallway does not exist,” she said. “Unofficially, it is the only way to move a test batch without crossing the public floor.”

  “Why do they allow it?” Nadia asked, scanning the junction for cameras.

  “Because people are lazy and will always find the shortest path,” Junie replied, voice low and conspiratorial. She rounded the first bend, then beckoned Tessa and Cal forward.

  Tessa entered the corridor, head tilting to orient her hearing. Footsteps echoed ahead, several of them, uncoordinated and light on the heel. Vendors, she guessed, or the Pavilion cleaning crew. Her instinct was to pull back into the shadow and watch, but Junie pressed on.

  Nadia followed, shoulders squared, tablet held up in a way that suggested it might be used as a shield if needed. Cal hung back for a beat, then caught up, not bothering to hide his suspicion of the space.

  As they neared the closet, the sounds amplified. The rolling of a cart. The scuff of a heavy boot. The clipped voices of early arrivals. Junie pressed herself flat against the wall and motioned for the rest to do the same.

  A white cooler turned the corner first. The same make as before. TimeSavr, digital lock, spotless. The person moving it wore an orange band on their left wrist, right up against the sleeve. Their other hand gripped the cooler handle, knuckles pale.

  Directly behind, a vendor in a green lanyard carried a tray of pastries, barely avoiding collision. Then a staffer in Pavilion blue, clipboard in hand, phone jammed to their ear. The corridor bottlenecked, and the group compressed like an accordion, none of them looking up until they were nearly on top of Tessa’s team.

  Cal stepped forward, subtly but decisively, blocking Tessa from the surge. His hand landed on her shoulder, pressure firm but not intrusive, then slipped away once the bodies passed.

  The moment barely lasted a second, but it registered. Tessa met Cal’s eyes for half a breath, then gave him a quick neutral nod. He returned it, and the whole interaction disappeared into the churn.

  The crowd surge ebbed as fast as it started. Tessa waited for the background noise to settle, then advanced to the closet door. Junie finished her map, then pointed to the junction ahead.

  “This is the weird part,” she said. “Here is the corridor, and here is the staff zone. Normal access needs a blue or higher badge. But see this panel?” She pointed to a reader next to the door. “If you have orange and a sponsor override, you can cut through without triggering a badge conflict.”

  Nadia ran her own badge, which beeped red. “Locked for everyone else,” she confirmed.

  Cal inspected the panel, eyes narrowing at the firmware label. “Two different security zones,” he said. “No camera on the junction. Deliberate?”

  Junie said, “Probably not at first. They just patched it whenever an event needed a new shortcut. Now it is tradition. But nobody talks about it, because nobody is supposed to use it.”

  Tessa asked, “Is it logged anywhere?”

  Junie shrugged. “Not unless you are on the admin team. But people notice. The cleaning crew has a bet on which interns get lost in here the most.”

  Nadia pulled up the facility schematic. “No camera in the closet or in the crossover. But there is a reader ping every time someone passes.” She glanced at Cal. “If we can get the unredacted logs, we could trace who used it and when.”

  He nodded, then jotted a note. “We will need the admin override from Dina. She is the only one who can pull corridor logs without sponsor approval.”

  They walked the rest of the corridor, looking for clues. Scuff marks on the baseboard. A faint scrape on the cooler side where it had been rammed against a cart. Tessa ran her palm along the wall, feeling for a pattern. The cleaning had been thorough, but near the closet hinge there was a smear, barely visible, but not quite the same as the rest of the gloss.

  Junie noticed. “That is from the cooler,” she said. “The corners are not rounded, and people cut the turn too close.”

  Tessa took out her phone and snapped a picture. She let the flash bounce off the wall, then compared it to the earlier photos. “It is the same cooler as before,” she said.

  Junie grinned. “See? Science. Or at least forensic geometry.”

  They paused at the next junction, where a narrow window showed the event floor ramping up, lights brighter, sound swelling. Nadia checked the time, then handed the evidence tablet to Tessa.

  “Next step is to match the reader pings to the time of the sabotage,” Nadia said. “Then we cross reference with the sponsor override log.”

  Junie peeled the orange event sticker from her jacket and stuck it to the map she had drawn. “That is where they get through,” she said, voice suddenly serious. “If you find who held the override, you will find your runner.”

  Tessa looked at the map, the mark of orange against the neutral background. She let herself imagine the figure slipping through, unseen but not unaccounted for.

  She said, “It is an exploit. Not just a shortcut.”

  Cal nodded. “Someone planned it.”

  They stood in the quiet for a second, each holding a piece of the discovery.

  “Let us go talk to Dina,” Nadia said.

  They moved on, the shortcut now burned into their internal maps, the orange mark vivid in Tessa’s mind.

  Next stop: the admin office and the unedited badge logs.

  Dina Mercer could have passed for a human stopwatch if she had not been so obviously powered by caffeine and existential dread. She rounded the end of the corridor at a velocity just under a jog, headset clamped to her jawline, clipboard hugged tight enough to warp the backing. Her eyes scanned the group, logged each face, then zeroed in on the fact that they were all standing where they very much should not be.

  She made it three steps before demanding, “Who authorized this access?”

  Cal met her head on, ID card out, voice calm. “Inspector Rusk, Maplewick Public Health. I am tracking a process anomaly on the corridor badge log.”

  Dina eyed the credential, then Tessa. “You are the Quality Lead,” she said, voice flat. “You are not cleared for the staff wing during event hours.”

  “We are not in the staff wing,” Tessa said, neutral and direct. “We are tracing a possible contamination pathway. The evidence points through here.”

  Dina’s nostrils flared. She checked the corridor clock, checked her clipboard, checked the group again. “You are holding up a scheduled vendor transfer,” she said. “I need this cleared now.”

  Junie, never one to let silence go unpunctuated, piped up. “We will be out before the next sweep. Promise.”

  Dina’s head ticked toward Junie, as if only just realizing there were more people in the huddle. “I need names,” she said, pulling a pen with the motion of a sword draw.

  Nadia held up the evidence tablet, screen facing Dina. “There is a one hour window on the badge logs. Accessed at zero five thirty three, corridor entry logged by an orange band. That corridor was supposed to be locked.”

  Dina’s hand hesitated, pen tip a centimeter above the clipboard. “That window should not exist,” she said, quieter now.

  Nadia continued. “If you pull up the override history, you will see the maintenance code logged at zero five twenty eight. That is five minutes before the access.”

  Dina’s face tightened. She thumbed her headset, muttering a string of numbers into the microphone, then turned away for a second, listening to the answer. When she turned back, her posture had lost none of its precision, but her voice had a quaver that was not there before.

  She said, “The system shows a one hour maintenance override. It was not authorized. Not by me.”

  The last words hung in the air, half confession, half challenge.

  Cal softened his stance. “We just need a snapshot of the access history. If there is an exploit, it is not on you.”

  Dina drew in a breath, then said, “You have ten minutes. After that, the corridor is locked for the vendor transfer.” She reached past them to the wall panel, keyed in her override, and stepped aside with the kind of efficiency that brooked no argument.

  As she did, Tessa noticed her hands. White knuckled, shaking ever so slightly, but still holding the clipboard true.

  Dina vanished up the corridor, voice already climbing into the headset microphone, calling for a system check. The group exhaled as one.

  Nadia tapped into the unlocked terminal, fingers flying. She navigated to the relevant timestamp, cross referenced the badge pings, then piped the result to her tablet. The loading wheel spun for a single agonizing heartbeat, then spat out a time stamped log of every orange band access in the facility that morning.

  She scrolled to zero five thirty three. “There,” she said.

  Tessa looked over her shoulder. The screen showed a string of blank names, but every entry carried a unique band serial. Next to the corridor entry, a new field appeared: Override. Sponsor Code: White Delta.

  “White Delta?” Junie said, eyes going wide. “That is admin level. Even event managers cannot run those unsupervised.”

  Cal wrote it in his notebook, then circled it. “If someone is using sponsor override, it is premeditated.”

  Tessa watched the timestamp, then said, “What about the camera?”

  Nadia did not answer. She was already loading the restricted hallway footage, this time through the admin interface. The picture was clearer, higher resolution, and the playback smooth.

  She advanced to zero five thirty three. A white cooler rolled into frame, just as they had predicted. But this time, the hand on the handle was visible in stark detail. Pale, strong, a line of faint ink just above the wrist.

  Nadia hit pause, then zoomed on the wrist.

  The orange band was unmistakable, even in grayscale. But more than that, along the edge, someone had drawn a tiny jagged black mark, like a lightning bolt.

  Tessa stared at the screen, feeling every neuron go taut. She did not know anyone in the current volunteer cohort, but she knew an identifier when she saw one.

  She said, “We have our suspect.”

  Cal said, “And a chain of custody.”

  Junie whispered, “We just need the name.”

  Nadia exhaled. “If we can get the barcode off the band, we can cross reference the serial to last cycle volunteers. Maybe someone got recycled into this event.”

  Tessa nodded. “Do it.”

  They watched the footage again, frame by frame, as the hand pushed the cooler past the camera field. The mark on the band caught the light, bright for a single instant.

  Nadia froze the frame, then enhanced the zoom, slow and careful.

  She said, “Got it. Seven digits. Last two are six eight.”

  Junie grinned, teeth sharp. “Dax will pop a vein if he finds out you beat the system with a freeze frame.”

  Cal allowed himself a half smile. “He will have to write a whole new protocol.”

  Tessa stared at the screen, letting the image burn in. The orange band, the hand, the cooler. The pathway was now mapped, and it led straight to the top.

  Nadia loaded the serial number, and the search returned a match. “It is a ghost badge, like Junie said. But if we cross it to the onboarding list, it is not a real name.”

  Tessa said, “But it is a real person. And we know where they moved the cooler.”

  They stood in silence, the hum of the corridor and the click of the tablet keys the only sound.

  Junie broke the hush. “You know, sometimes you run the shortcut and sometimes the shortcut runs you.”

  Nadia said, “Let us tell Dina. She deserves to know her system is not broken, just exploited.”

  Cal closed his notebook. “We will need to pull every batch handled by this badge. And figure out what was in the cooler.”

  Tessa nodded, then looked at the paused image again. “We will.”

  They gathered their notes, the digital printouts, and the freeze frame evidence.

  In her mind, the orange band kept looping past the lens, over and over, like the tick of a stopwatch.

  She left the corridor, ready to chase the next link in the chain.

  Case File Addendum: “Want the full standalone mysteries set in this world (no system required)? Read the complete cases here: