Read Chapter 3: The Body

The night air carried the damp bite of the Thames as Alex cut the engine of his Prius and coasted to a stop behind a row of police vans. Blue lights pulsed silently across the brutalist concrete of the Tate Modern, throwing the gallery's vast, cathedral-like hulk into stark relief. He wasn't supposed to be here. His shift had ended an hour ago, and his authorised route home took him north, not east across the river. But the Metro alert had bloomed on his phone like a poisoned flower, and something in his gut had twisted taut.

*Unidentified male. Turbine Hall. Deceased.*

He killed the headlights and stepped out, pulling his collar up against the river wind. The outer cordon was manned by two uniformed PCs he didn't recognise, and they eyed him with the flat, wary suspicion of men handling a gruesome scene. He flashed his Metropolitan Police ID card—the one that still worked, even if it was compromised—and gestured at the digital tablet one of them held.

“Sentinel. I need a look at the entry logs for the external sensor array. We're running a pattern match on access anomalies,” he said, the lie smooth as glass. It was plausible enough. His division fed them data, not the other way round.

The older PC squinted. “It's a crime scene, mate. DI Hayes is already here. You should clear it with her.”

Alex's heart stuttered at the name. Rachel Hayes. His boss. The woman who'd been sitting across from him in that interview room just hours ago, studying him like a lab specimen. Not a good idea. Not a good idea at all.

“She'll want this first,” he said, tapping the tablet. “One of the external feeds glitched during the window. Could be our camera angles, could be a glitch in her witness testimony. I'm just here to confirm the data chain before it degrades.”

He held his breath. The PC looked at his partner, who shrugged. The cordon was lifted a foot, and Alex ducked under, heart hammering against his ribs.

The Turbine Hall was vast and cold, a concrete canyon lit by the eerie glow of portable floodlights. At its heart, a white forensic tent had been erected, and around it, like flies on meat, clustered SOCOs in white Tyvek suits. Alex kept his head down, moving along the far wall, fingers brushing the cold concrete, his eyes scanning for the one thing that shouldn't be there.

He saw it before the forensics team did. Tucked against the wall, half-hidden behind a discarded coffee cup that had been crushed underfoot, lay a single Oyster card. It looked lost, incidental, a piece of daily London litter. But Alex noticed what the police, focused on the body, had missed entirely. The card was pristine. No scratches, no wear. Someone had placed it there, not dropped it.

He crouched, using his phone to take three rapid photos, the flash muted. The screen confirmed what he suspected. The card was a limited-edition commemorative version from three years ago, commemorating the opening of the new Elizabeth Line. Only a small batch had been issued. And on the back, a faint, almost invisible mark. A tiny, laser-etched numeral: a server rack identifier.

He pocketed his phone and rose, just as a figure emerged from the forensic tent.

“Mercer.”

The voice was ice water down his spine. Alex turned, forcing his face into a mask of surprised competence. DI Rachel Hayes stood before him, her coat open, her dark hair pulled back tight. Her eyes, the colour of slate, held no warmth.

“I hadn't expected to see you here,” she said, each word precise.

“There was a system anomaly,” Alex said, gesturing vaguely at the ceiling. “One of the external threat detection nodes went offline during the incident window. I'm tracing the data path before the logs roll over. Standard procedure.”

Hayes's gaze swept over him, lingering on his shoes, his hands, the phone he'd just pocketed. “The victim was found fifteen minutes after your shift ended. You're off the clock. And yet here you are, thirty minutes from your flat, in the wrong direction.”

Alex's mind raced. "I saw the alert on my way home. I was on the bridge, saw the vans. I thought it might be worth a look—if there's a connection to the module, I don't want to trace it through the system tomorrow when the trail's cold."

A ghost of a smile played on Hayes's lips, but there was no warmth in it. "Dedicated." She gestured at the tent. "Since you're here. Take a look. Maybe your system tells you something my people missed."

She pulled back the flap. The body lay on a metal gurney, covered with a white sheet, except for the face. The skin was pale, the eyes closed, the mouth slightly open. A man in his early forties, with a lean, sharp-featured face and the faint shadow of a beard. There was no obvious wound, no blood, just the serene, almost peaceful expression of a man who'd simply stopped.

Alex looked at the face for a long moment. The blow came not from the corpse's stillness but from the recognition that bloomed in his memory like a nausea. He'd seen this face before. In old files, in faded photos in a secure archive.

Marcus Reed.

The dead man was a ghost. A hacker who'd been burned out of the system years ago, who'd traded his knowledge for a new identity and a quiet pension. Reed had been an informant for Sentinel in its early days, feeding the AI with examples of how to spot radicalisation patterns by mapping online activity. He'd been a sharp, paranoid, useful asset. And then he'd dropped off the face of the earth.

“No ID,” Hayes said. “No phone, no wallet. Clean pockets. But the state coroner says there's no sign of a struggle. No contusions, no needle marks. He just... sat down and died.”

Alex forced a neutral expression. “Did you check the victim's history against any known actor indices?”

Hayes tilted her head. “The facial recognition system flagged no match against any criminal database. Why? Does he mean something to you, Mercer?”

The question hung in the air like a shard of glass waiting to drop. Alex knew better than to lie too fast, and better still not to tell the truth. “No. But I can run him through the secondary external data sets. Might pick up a residual pattern, a ghost feed that wasn't scrubbed.”

Hayes nodded slowly, then stood aside to let him leave. "Send me your report first thing. In person. Don't call it in."

He walked out of the Tate, his breath clouding in the cold air, his mind a tempest. Marcus Reed. Informant. Ghost. Dead. On the same day that Alex's own name had appeared on a threat list. The same day his credentials had been used without his knowledge. The connections were forming like ice on a window, and none of them were pretty.

In his car, he drove a mile before pulling into a petrol station, killing the engine. He pulled out his phone, opened his encrypted tunnel, and initiated a facial recognition search against the Sentinel archive he had limited access to. It took two minutes for the system to churn through the servers, cross-referencing against the public UK database and the more sensitive, black-flagged files tucked away in sub-vaults Alex technically wasn't authorised to touch.

The match fired. Clearance Level 7. Reed was flagged as a Covert Source Removed from Active Service. And there, in a sub-menu marked *Terminal Disposition*, he found a date stamp from a year ago. *File last accessed.* Not by Reed. By someone using a compromised Sentinel admin account. An account that had been created in Alex's name.

He stared at the screen, the implications pressing down like a weight across his chest, until a new notification bloomed at the top of his screen. A system ping from the ghost feed that had flagged him earlier that night. But instead of his name, it displayed a new alert:

*Subject: Alex Mercer. Prediction: 48 hours. Location: Unknown. Outcome: Corroborated.*

His blood turned to ice. The system hadn't just flagged him. It was predicting his own death. And it had just updated its timeline. The Oyster card in his pocket suddenly felt heavier. Someone had planted it at a murder scene for a reason. And Marcus Reed's corpse had been the bait.