Read Chapter 37: The Loose End

The Calais bar was called Le Dernier Verre, and it smelled of stale beer and salt. Mercer had chosen it because it was the kind of place where two people nursing bruised ribs and worse pride could sit undisturbed. Camille sat across from him, her arm in a makeshift sling fashioned from a scarf she’d bought from a street vendor an hour ago. She nursed a whiskey sour like it was medicine.

Neither of them had spoken much since the debriefings.

Then Mercer’s phone buzzed. A burner, one of three he’d purchased after MI6 had confiscated his official issue. The screen showed a blocked number. He stared at it, then at Camille.

“You get one of those?” he asked.

She pulled her own phone from her coat. A single message, same blocked origin: *The coffee shop on Rue de la Paix. Noon. Come alone. Both of you.*

Camille’s laugh was hollow. “Alone, but together. They know us well.”

“Could be a trap.”

“Could be,” she agreed, finishing her drink and sliding off the stool. “But we’re already dead professionally. No reason not to see who’s digging up the grave.”

---

The coffee shop was narrow and warm, with a zinc counter and a proprietor who didn’t look up when they entered. A man sat in the back booth, gray-haired, civilian clothes, a cup of espresso cooling in front of him. He raised two fingers without looking at them.

Mercer slid into the booth across from him. Camille took the seat beside the window, angled to watch the street.

“I’m not going to waste time asking who you are,” Mercer said. “M16 would have sent someone with worse posture. CIA would have sent someone with a gun. So you’re the joint task force nobody wanted to admit exists.”

The man smiled, small lines crinkling at his eyes. “André, though that’s not my name. You’re right about the task force. We’re the quiet cleanup crew for the mess your agencies made.”

“Our agencies made?” Camille’s voice was flat. “We contained the dispersal. The train burned. No one died.”

“No one you know of,” André said. He pulled a folded photograph from his jacket and slid it across the table. It showed a man in his sixties, balding, with the pale complexion of someone who spent years in laboratories. “Henri Fournier.”

Mercer felt his stomach drop. The name was a ghost from his mentor’s files. “Fournier’s dead. Has been for three years.”

“Officially.” André tapped the photo. “His research was the foundation for the toxin vial you recovered. Fournier was developing a targeted neurological agent for a private defense contractor—legitimate, or so he was told. When he discovered what they actually intended, he went to ground. He passed his research to someone he trusted.”

Mercer’s jaw tightened. “My mentor.”

“Doucet. Yes. The same man who taught you the override code that saved hundreds of lives on that train.” André leaned forward. “What you don’t know is that Fournier also gave Doucet the key to the antidote: a formula embedded in a custom cufflink. The last piece of Fournier’s work that could neutralize the toxin entirely.”

“The cufflink Remi threw into the tunnel,” Mercer said.

“The very one.” André sat back. “We’ve recovered what we can from the wreckage. But tunnels are deep, and the currents from the water main have already moved debris. There’s a chance—a slim one—that the cufflink survived and is still down there. But we can’t risk official recovery. If the party who financed this operation gets word we’re hunting for it, they’ll send someone faster than we can clear the line.”

Camille finished scanning the street and turned back. “So you want us to go crawling through a flooded tunnel on administrative leave to find a needle in a needle-stack.”

“More or less.” André’s expression didn’t change. “But there’s a problem. We’re not the only ones who’ve connected Fournier’s research to the cufflink. Remi is still alive, and he hasn’t gone quiet.”

Mercer’s hand stilled on his cup. “He knows where he threw it.”

“He knows roughly. And he’s shopping the location to interested parties.”

“Who’s the buyer?”

André hesitated, then slid a second piece of paper across the table. It was a transfer record, redacted, showing a series of numbered accounts funneling money through a shell company registered in the Channel Islands. The beneficiary name had been stamped over with black ink, but a single line was still visible.

*Aristotle Holdings.*

Mercer didn’t recognize it. But Camille stiffened.

“Aristotle,” she repeated. “That’s a name I haven’t heard in five years.”

Mercer looked at her. “You know it?”

“Not by choice.” She pulled her gaze from the paper. “Aristotle Holdings was a front for a consortium of European arms dealers who specialized in selling bioweapons to governments with diplomatic immunity. They were dismantled after a sting in Rotterdam. Everyone thought the principals were dead or jailed. Apparently not.”

“You were on that sting?”

“I was supposed to be. I was pulled off two days before it went down. My handler at the time said there was a leak.” Her eyes were hard. “The operation was scrubbed. Half the target list got away.”

Mercer read between the lines. “Someone in your own agency tipped them off.”

Camille didn’t confirm, but she didn’t deny it either.

André cleared his throat. “The financing for the train operation traces back to a numbered account that was seeded by Aristotle Holdings. We can’t trace further without crossing into assets protected by sovereign agreements. That’s why we need you. Unofficially, you can go places we can’t.”

“And if we find the financier?” Mercer asked. “We hand him to you? For what? A quiet trial and an exchange for some asset we’ll never hear about?”

“You hand him to us, and we’ll make sure the evidence reaches the right desks. What happens after that isn’t guaranteed.” André pushed his cup aside. “You were both censured. You both know the official channels failed. This is your chance to close the loop. Fournier’s research, Doucet’s code, the cufflink—it all connects to one person who wanted that toxin released.”

“Why do you care?” Camille’s voice was sharp. “You’re task force. You get paid to clean up, not to chase ghosts.”

André’s lips pressed into a thin line. He reached into his coat and pulled out a small, worn photograph. It showed a young woman in a lab coat, smiling, a lanyard with a now-familiar name around her neck.

“Fournier’s daughter,” he said quietly. “She was on that train. She’s alive because of you. But the toxin was designed for people like her—civilians, scientists, anyone who might develop a countermeasure. The person who funded it wanted to erase a generation of researchers. That includes her.”

He stood, buttoning his coat. “I’m not asking for justice. I’m asking for math. You find the financier, and the debt that started with Fournier gets paid.”

He left the bill on the table and walked out without looking back.

---

The street outside was cold, the sky a flat gray that promised rain. Mercer and Camille stood on the curb, watching André disappear around a corner.

“Aristotle Holdings,” Mercer said. “You believe it?”

“It’s a lead, which is more than our agencies gave us.” Camille shifted her sling. “But I’m not walking into that tunnel without a plan. Remi’s still out there, and he’ll know exactly when we go looking.”

“That’s the point.” Mercer pulled out his phone and scrolled to the last message from his dead mentor, the override code glowing faintly on the screen. M4R5H4LL. All caps, like a navy man. “If Remi is shopping the cufflink location, then the financier will be watching. We send one message through the right channels—remind them we have Fournier’s research notes, the ones Doucet kept—and we’ll make them come to us.”

Camille raised an eyebrow. “You have the notes?”

“I have the memory of them. Doucet made me memorize the key pages in case physical copies were compromised. Enough to make a believable forgery.”

“And then?”

“And then we wait. The financier will send someone to buy or steal the notes. Remi will want to keep his cufflink deal exclusive.” Mercer pocketed the phone. “They’ll come to us, and we’ll follow the money.”

Camille was quiet for a long moment. Then a thin smile crossed her face, the first genuine expression Mercer had seen from her since the train.

“You’re asking me to counterfeit intelligence to bait a phantom financier and a rogue bio-engineer, using dead men’s research, with both of us on administrative leave and zero official support.”

“Yes.”

She laughed, short and dry. “Best offer I’ve had all week. Where do we start?”

Mercer looked at the café’s window, where their abandoned cups sat side by side on the table. “With Fournier’s last known address in Paris. If Aristotle financed the train, they’ll have cleaned his flat. But clean crews miss things. And I owe it to Doucet to check.”

Camille nodded, already moving toward the curb to hail a taxi.

“One condition,” she said. “If we find the financier, and Remi shows up, I get first shot.”

Mercer followed her. “Fine. As long as I get the cufflink.”

“Deal.”

The taxi pulled up. They got in without looking back, leaving the empty cups behind.

Outside, a fine rain began to fall, washing the last dust of the tunnel from their coats.

---

Two blocks away, a man sat in a parked black sedan with tinted windows. He watched the taxi pull away, then lifted a phone to his ear.

“They’re moving,” he said. “The Englishman and the Frenchwoman. They’re going to Paris.”

The voice on the other end was calm, almost amused.

*Let them. They’re following a trail I left for them. When they reach its end, they’ll find only the truth I want them to see.*

The sedan’s engine hummed to life. It pulled into traffic, sliding behind the taxi at a discreet distance, vanishing into the gray morning.