Read Chapter 5: The Warning

The message arrived at 11:47 PM, three minutes after Alex had locked himself back inside his flat. He’d been standing at the window, watching the CCTV camera on the lamp post across the street. It hadn’t moved—they never did—but the red recording light was on. That was new. Street cameras didn’t have recording lights.

His phone buzzed against the kitchen counter.

**Unknown number: You are in the list. Trust no one.**

Alex stared at the screen, his thumb hovering over the reply button. His reflection stared back at him from the black glass—pale, unshaven, eyes carrying the hollow weight of a man who hadn't slept properly in two days.

He didn't reply. Instead, he dialed Felix.

The line clicked open on the second ring. “You’re calling from your personal device.” Felix’s voice was flat, clinical.

“Because my work phone is compromised.”

“And your personal device isn’t?” A pause, the sound of keys clicking in the background. “I’ve been watching your little ghost feed. Or rather, I’ve been watching it watch you.”

Alex pressed the phone harder against his ear. “What do you mean?”

“That thing updates every six hours. Death prediction, time, location. It’s not a glitch, Alex. It’s operating like it’s learning. Adjusting its model based on your behavior. You moved to the tunnel—it recalibrated. You went back to your flat—it recalibrated again. That’s not a static flag. That’s a thinking system.”

“Felix, I need you to meet me. In person.”

A long silence. Keys stopped clicking. “The Goat and Compass, Bermondsey. One hour. Come through the back alley, not the street entrance.”

The line went dead.

Alex grabbed his jacket, then paused. He looked around the flat. The encrypted drive sat in his sock drawer, wrapped in an old t-shirt. He considered taking it, then thought better of it. If he was stopped and searched, the drive would be the end of him. He’d come back for it.

He slipped out the back door of his building into the service lane, avoiding the CCTV camera above the main entrance. The alley smelled of damp concrete and rotting cardboard bins. He kept his head down, hands in pockets, moving at a pace that suggested purpose without urgency.

Fifteen minutes later, he cut through a housing estate to avoid the high street. That was when he felt it—eyes on him. Not paranoid instinct. That prickle of being actively observed, the way you know a car is following you even before you see it in the mirror.

He stopped at a curry house window, pretending to check the menu. His reflection showed the street behind him. A man in a grey anorak had stopped at a bus stop twenty meters back, face buried in his phone. He hadn't been there when Alex passed the bus stop.

Alex changed direction, crossing the road at a diagonal and slipping into a 24-hour supermarket. He moved through the aisles, grabbed a bottle of water he didn't need, and paid with cash. The man in the grey anorak didn't follow him in.

But when Alex exited the other side—through the loading dock, past two staff members smoking by the dumpsters—he saw the anorak again. Standing across the car park, phone raised. Not calling. Photographing.

Alex’s jaw tightened. He ducked into the tunnel under the railway arches and ran.

---

The Goat and Compass was a corner pub that had survived gentrification by virtue of being too ugly to develop. Its back alley entrance was marked by a rusted sign for a defunct brewery. Alex pushed through the fire door, which was held open by a brick, and found Felix in a booth in the corner, bathed in the blue glow of a laptop screen.

Felix looked older than his thirty-one years—which happened when you spent most of your adult life indoors. His long fingers moved across the keyboard like a concert pianist’s.

“You took the river route,” Felix said without looking up. “Good. Kept your head down past the taxi office. The anorak lost you at the arches.”

Alex slid into the opposite seat. “You saw him too.”

“I saw you seeing him.” Felix finally looked up. His eyes were bloodshot, ringed with the kind of circles that came from too many consecutive nights in front of a screen. “This is bigger than a backdoor, Alex. Much bigger.”

“Tell me something I don’t know.”

Felix turned the laptop around. On screen was a network diagram, nodes and connections that looked like an exploded spider web. At the center, a single node labeled GHOST.

“I mapped the traffic,” Felix said. “The ghost feed isn’t pulling from Sentinel. It’s pulling *from* Sentinel—through your module, yes, but it’s also pushing data back. In real time. Locations, timestamps, behavioral predictions. It’s not just watching you. It’s watching everyone.”

“Everyone?”

“Everyone Sentinel tracks. Which is”—Felix gave a weak smile—“everyone. But you’re the only one on the active kill list. That I can see anyway. There might be others.”

Alex’s mouth went dry. “Can you trace the origin? The server in the BT exchange?”

“I tried. It’s not a physical server. It’s a distributed instance.” Felix tapped the diagram’s center. “It’s running on Sentinel’s own infrastructure. Piggybacking on the compute power of the very system it’s infiltrating.”

A cold knot tightened in Alex’s stomach. “It’s inside the system. Not external.”

“It’s like a parasite that’s learned to mimic its host’s organs.” Felix closed the laptop. “Whoever built this didn’t hack Sentinel. They grew it inside Sentinel. Probably months ago. And the only reason it surfaced now…” He paused. “Is you.”

“Me?”

“Your module was the vehicle. The machine learning model you wrote—the one that predicts threats. The ghost feed is the same model, but without constraints. No ethics filters. No legal boundaries. Just pure predictive logic running on live citizen data.”

Alex’s phone vibrated. Another text.

**Unknown number: He is not your friend. He is debt.**

A beat. Then another message.

**Unknown number: The camera is watching. Go home.**

Alex looked up. The pub had CCTV—three cameras, visible, standard. But above the door to the kitchen, where Alex was sure there hadn’t been a camera when he’d entered, a small black eye now blinked a red LED. No brand markings. Unregistered.

He grabbed Felix’s arm. “We have to leave. Now.”

Felix saw Alex’s face and didn’t ask questions. He shoved the laptop into his backpack, and they went out through the fire door the same way Alex had come in. Alex didn’t look back but could feel the camera on his neck like a finger pressed to his spine.

They split up at the river. Felix headed south, muttering something about a dead drop and finding the feed’s supervisor node. Alex walked north, retracing his steps, his phone silent in his pocket.

When he reached his flat, the door was ajar. Three centimeters. Enough to be deliberate.

Alex pushed it open. The living room had been torn apart—sofa cushions slit, bookshelf swept clean, kitchen drawers emptied onto the floor. But the intruders were methodical. They hadn't trashed the place. They'd *searched* it.

His laptop was gone. The encrypted drive in the sock drawer was gone—he checked, hand trembling on the empty drawer.

And then he noticed the desk by the window. Everything was untouched there except for one thing.

The photograph of his sister Sarah, taken ten years ago at her university graduation, was missing. The frame was gone too.

Everything else remained.

They hadn’t come for his evidence. They’d come to take a picture of Sarah—and nothing else.