Thames House loomed over the river like a fortress of glass and steel, its windows reflecting the stormy, dark sky. Most Londoners walked past it without a second glance. Jake and Emma walked toward it, knowing the truth:

Someone inside was hunting them.

The white hatchback rolled to a stop in an underground service bay beneath the building. Jake killed the engine. The silence that followed felt heavy, suffocating.

Emma turned in her seat. “Mercer, last chance. If you know something we don’t—”

Mercer shook his head. “I know pieces. Fragments. Enough to get me killed, not enough to stop them.”

Jake opened the door. “Then let’s get the rest.”

They escorted Mercer through a side entrance, bypassing the main security scanners. Emma flashed her credentials at the guard on duty — a young officer who looked half‑asleep.

He blinked at Mercer. “Is that—”

Emma cut him off. “Classified transfer. Log it as internal movement.”

The guard hesitated, then nodded. “Yes, ma’am.”

Jake felt a prickle at the back of his neck. The guard’s eyes lingered too long. His hand hovered near the comms panel. Not pressing it. But thinking about it.

Emma noticed too. “Move,” she whispered.

They took the stairs instead of the lift, climbing three flights to a restricted briefing level. The corridor was quiet, lit by soft white lights that hummed faintly overhead.

Jake pushed open the door to a secure meeting room. Soundproofed. Shielded. No windows.

Mercer stepped inside slowly, as if expecting the walls to close in.

Emma locked the door behind them. “Talk.”

Mercer sat at the table, rubbing his wrists. “The leak isn’t just one person. It’s a network. A hidden layer inside MI5. They call themselves the Inner Line.”

Jake frowned. “Never heard of it.”

“You’re not supposed to,” Mercer said. “Only senior officers know. And only the corrupted ones use it.”

Emma leaned forward. “What’s their purpose?”

Mercer hesitated. “To control intelligence flow. To decide which operations succeed… and which ones fail.”

Jake felt the chill again. “Asset deaths.”

Mercer nodded. “All orchestrated. All profitable.”

Emma’s voice hardened. “And you found proof.”

“I found patterns,” Mercer said. “Access logs. Timing anomalies. Communications routed through dead channels. Enough to know something was wrong.”

Jake crossed his arms. “So you stole the data.”

“To protect it,” Mercer said. “To stop them from wiping it.”

Emma paced slowly. “You said earlier the mole isn’t working alone. That there’s someone close.”

Mercer’s eyes flicked toward the door. “Closer than you think.”

Before Jake could press him, the door handle clicked.

Emma drew her weapon instantly.

The door opened.

Director Shaw stepped inside.

Tall. Immaculate suit. Expression carved from stone.

Jake’s stomach dropped.

Shaw looked at Mercer first. “You’ve caused quite a mess.”

Then, at Jake and Emma. “And you two have made it worse.”

Emma didn’t lower her weapon. “Sir, with respect—”

“Put the gun down, Clarke.”

His tone was calm. Too calm.

Jake stepped between them. “Director, the safehouse was compromised. Someone inside—”

“I know,” Shaw said.

Jake froze. “You… know?”

Shaw walked to the table, hands clasped behind his back. “The breach team was ours.”

Emma’s breath caught. “What?”

Shaw looked at Mercer with cold disdain. “You stole classified data. You endangered operations. You forced our hand.”

Mercer stood slowly. “You tried to kill me.”

Shaw didn’t blink. “I authorised a retrieval. Not an execution.”

Jake felt the lie before he heard it.

Emma stepped forward. “Sir, with respect, the team that hit the safehouse wasn’t MI5. They were off‑books. Armoured. Professional.”

Shaw’s jaw tightened. “You’re mistaken.”

Jake shook his head. “No. We’re not.”

Shaw turned to him. “Agent Hunter, you are dangerously close to insubordination.”

Jake didn’t back down. “And you’re avoiding the truth.”

Silence.

Heavy. Electric.

Shaw exhaled slowly. “You want the truth? Fine.”

He leaned forward, eyes cold.

“Mercer is a traitor. He stole sensitive data. He compromised assets. He is responsible for the deaths you’re so concerned about.”

Mercer slammed his fist on the table. “Lies!”

Shaw didn’t flinch. “He’s manipulating you. Both of you.”

Emma’s voice was barely a whisper. “Sir… why would he run toward us if he wanted to hide?”

Shaw’s eyes flicked to her.

And for the first time, Jake saw something behind them.

Fear.

Not of Mercer.

Of what Mercer knew.

Jake stepped closer. “Director… if you’re innocent, let us verify the data. Let us see the real drive.”

Shaw’s expression hardened. “The drive is irrelevant. Mercer destroyed it.”

Mercer shook his head violently. “No. I hid it.”

Shaw turned slowly.

“You what?”

Mercer swallowed. “I hid it. And I’m the only one who knows where.”

Jake felt the shift — the moment the balance of power in the room changed.

Shaw’s voice dropped to a dangerous whisper.

“Then you’ve just signed your death warrant.”

Emma raised her weapon again. “Sir, step back.”

Shaw didn’t move.

Instead, he smiled.

A small, cold, terrifying smile.

“You still don’t understand, do you?”

Jake’s pulse hammered.

Shaw straightened his tie.

“You’re already too late.”

The lights flickered.

The door behind Shaw unlocked.

Footsteps approached.

Heavy. Coordinated.

Jake realised the truth in a single, sickening moment.

Shaw wasn’t the mole.

He was the shield.

Protecting someone worse.

Emma whispered, “Jake… someone’s coming.”

Jake raised his weapon.

Mercer backed away from the door.

Shaw stepped aside.

And the door swung open.