ASSOCIATED PERSONS: 0.
The zero sat in the centre of the display, the cursor pulsing behind it.
Martin Tan opened the relationship field. Nothing appeared beneath it. There was no name, identity number or restricted-access symbol. The system was not withholding the second person in Ian Cheong's missing guardianship record. It was stating that there had never been one.
Martin entered his own auditor ID.
INVALID RELATIONSHIP TYPE.
He entered the night guard.
INVALID RELATIONSHIP TYPE.
UNKNOWN GUARDIAN.
PERSON DOES NOT EXIST.
Each warning appeared in the same place, precise and courteous, closing the same door in a slightly different way.
“Should I call your supervisor?” the guard asked.
Martin glanced at the bottom-right corner. The case had no Close button, but it did have a retention timer. 00:09:41 and falling.
“Not yet.”
“My incident report is still blocked.”
“I've taken ownership. I need two things from you. Nobody opens the isolation cabinet on level eight, and nobody lets the stairwell recording roll over.”
The guard hesitated. “The system classified it as an ordinary fall. Those recordings only stay for twenty-four hours.”
“Then my review starts now.”
Martin asked him to sign the witness field. At the monitoring-room door, the guard looked back as though he wanted to mention the raincoat again. What he said instead was, “You don't look well, Mr. Tan.”
When the door closed, Martin took the hair clip from the deepest pocket of his jacket.
The pale blue star lay inside clear plastic, one tooth broken through the middle. On the fire stairs his thumb had found that break without looking. Now, even through the bag, the familiarity was beginning to recede.
He placed it beside the terminal and did not register it.
It was the first piece of evidence he could not trust to the system.
The monitoring room contained an isolated review station used when communications, access logs and video disagreed about time. Martin signed in with senior clearance and grouped the new case, the stairwell footage and his phone's device ID into a temporary investigation.
The software proposed four likely explanations: employee medical event, equipment fault, spoofed call, unauthorised entry.
Martin removed the first three.
Unauthorised entry into what?
The page offered no answer.
He began with the call.
The most recent incoming call on the phone had arrived at 6:12 p.m. His mother had wanted to know whether he was coming home that weekend. Duration: two minutes, twenty-seven seconds. After that, the history was empty. At 11:41, when his own number had filled the screen, the device claimed it had been locked on his desk.
The raw communications database agreed.
So did the carrier signalling archive. Every call, answered or not, left a sequence behind it: request, exchange route, tower handover, termination. A caller could forge the number shown on a screen. Forging three independent switching records was another matter.
Between 23:40 and 23:45, Martin's phone had remained attached to the cells around Tianheng Tower. MODE: IDLE. VOICE CHANNEL: UNUSED. DATA CHANNEL: STABLE.
No one had called him.
He widened the search to the entire city, then searched backwards from his own number. No second device had borrowed his identity. No foreign exchange had attempted a route. For those three minutes his number existed only in the phone he had been holding, and it had gone nowhere.
Martin checked the desk telephone. At 23:42, he had called security for twenty seconds. That recording contained his voice and the guard's. His mobile had been on speaker beside him. The older version of his own voice should have said, You have one minute and fifty-two seconds.
The desk system had captured no third speaker.
Martin listened three times. His own questions were measured. The guard's answers were clear. Far behind them lay air-conditioning and rain. On the third pass, he noticed a pause eight seconds in, as though he had stopped to let someone else finish a sentence.
The pause lasted 2.4 seconds.
The voice-analysis tool classified it as ordinary thinking time.
He opened the level-eight office camera.
At 23:41, the Martin in the recording lifted his phone to his ear. The image was sharp enough to show the lock screen. He spoke to a black pane of glass, looked towards the elevator and crossed to the security telephone.
The elevator indicator remained on 3.
Martin remembered watching it climb through 4, 5 and 6. He remembered the emergency stop insisting that no car was moving. He remembered the unprinted 9 waking inside the black panel. On camera, nothing above the doors ever changed.
At 23:44:31, recorded Martin stood in front of the elevator with his phone raised. One second later he occupied exactly the same position. The folds of his shirt had not moved.
Only part of his shadow was missing.
In the next second, Martin himself was gone.
The feed did not skip. Rain continued down the glass. The timestamp advanced. The chair remained at the doors. The event classifier added one line: EMPLOYEE EXITED DETECTION AREA.
The detection area covered an office floor without blind spots.
Martin placed the office video beside the stairwell recording. One version of him vanished from level eight at 23:44. Another was scanned onto the fire-stair landing at 23:51. For six minutes and twenty-nine seconds, no system in Tianheng Tower acknowledged that he existed.
The retention timer fell to 00:05:18.
Martin selected Lock Evidence.
CLEARANCE INSUFFICIENT.
Only city-infrastructure cases should have outranked his credentials. This case displayed no security level at all, yet he was not allowed to preserve his own data.
Martin unplugged the review station's network cable.
A warning filled the screen: OFFLINE RECORDS WILL LOSE CONSISTENCY PROTECTION.
He confirmed.
The fans rose to a hard whine. The cloud symbol disappeared. The timer stopped at 00:04:52. On the video, Martin remained frozen one frame before his disappearance.
Disconnecting the station would generate a security incident. Julian Chow would see it in the morning. So would their supervisor. Martin did not reconnect. A clean work record mattered less than keeping those four minutes and fifty-two seconds from reaching zero.
He mounted a read-only audit drive and began the transfer.
Call history, carrier signalling, desk recording, both security feeds. Every record preserved the same conclusion: the call from Martin's own number had never happened.
The transfer stalled when it reached the phone cache.
UNARCHIVED AUDIO FOUND: 1.
DURATION: 00:41.
The source application had no name, only an identifier made entirely of zeroes. Created 23:42:11. Ended 23:42:52. The file sat inside the exact span of the impossible call.
Martin opened it.
The waveform was flat.
He raised the gain. There was no rain, no breath, no exhausted voice warning him about the lift. Forty-one seconds passed in a silence cleaner than any mute recording. Even the electrical noise of the phone appeared to have been removed.
EMPTY FILE, the software reported. DELETION RECOMMENDED.
Martin kept it.
The Export control remained disabled. The file's creator was zero, its owner was zero and its associated case was zero. The station could not identify anyone entitled to remove it.
He switched to spectral view.
The display was black at first. Martin lowered the floor below the device noise, then amplified the phase difference between the left and right channels. Two hair-thin blue traces surfaced at the third second, one high and one low, separated by less than a second.
They returned at twelve seconds. Twenty-one. Thirty. Thirty-nine.
Not sound. The pressure left in the silence after sound had been taken away.
The first frequency held steady. The second dipped slightly and always arrived eight-tenths of a second late.
Martin removed his hand from the mouse.
He knew that rhythm.
The flat where he had lived until fifteen had a mechanical two-note doorbell. The first bar rang bright. Damp had lowered the second. Once the contact began to oxidise, the second note arrived eight-tenths of a second late. His father cleaned the mechanism more than once rather than replace it. Every long spell of rain brought the delay back.
Ding.
A fraction too long.
Dong.
Martin could hear none of it through the headphones. On the screen, however, the pattern of that discarded doorbell repeated every nine seconds, five times inside the forty-one-second blank.
He set the bagged hair clip against the monitor. For an instant, the blue star overlapped the blue frequencies.
The old flat had not been improvised entirely from his memory. Something from inside that home had entered the call before he entered the corridor.
Martin attempted phase recovery. The first pass produced a needle of static. The second yielded the tail of a metallic vibration. On the third, the software stopped and announced that the silent region contained a protected personal voiceprint. Network verification was required.
Martin declined.
The request returned.
He disabled automatic correction, divided the spectrum into still images and forced a local export. Each image he saved shortened the original audio by one second. The system was not preventing a copy. It was making the copy consume its source.
Martin stopped.
Thirty-seven seconds remained.
For the first time in his career, he had to choose between complete evidence he could not remove and incomplete evidence he could carry. He kept the four exported images and left the rest on the disconnected station. The moment anyone restored the network, the surviving audio might vanish.
The access reader sounded outside.
Martin returned the hair clip to his jacket.
Julian Chow entered with two cups of vending-machine coffee. He was the only person on the overnight review team with backup access to the monitoring room. Over the past five years, he had countersigned more of Martin's difficult audits than anyone else.
“Security says you took a review station offline.” Julian set one coffee beside him. “I assumed the alert was wrong.”
“It isn't.”
Julian saw the paired security recordings. The faint amusement left his face. “Are you hurt?”
“Not badly.”
“Where's the red raincoat?”
“Isolation cabinet. Don't let anyone process it.”
Julian nodded. He did not ask why Martin sounded as if someone might try to take the case away. He checked the severed network cable, then the frozen countdown on the guardian record.
“Who's Ian Cheong?”
“I don't know.”
“And your sister?”
Martin looked up.
Julian was watching him, one hand still beside the empty network port.
“Why do you keep saying sister?” he asked.
Only the review station's fans moved the air between them.
Martin remembered finding the blank audio, identifying the bell and exporting four images. He had made no call. No one else had been in the room.
“I haven't said it.”
Julian's expression did not change.
“Martin,” he said, “you've said it seven times since I walked in.”