Read Chapter 33: The Betrayer

The cellar door was warped, swollen with damp, and it took two hard kicks to drive it shut. Émile slid the iron bolt home and stood there, breathing through his teeth, the warden’s hooked medallion still pressed cold against his sternum beneath his tunic. His knuckles were raw where one of the deserters had bitten him. The other one—the one with the soft, round face and the trembling hands—had stopped screaming when Émile put his knee on his chest and told him he would break his jaw if he made another sound.

Now they were in the dark, behind the wood, and Émile was alone in the passage of a ruined sugar factory on the eastern edge of the plateau.

He leaned his forehead against the doorframe and let his pulse settle. The air smelled of coal dust and burnt sugar, a sweetness gone bad. Outside, the guns had resumed their grumbling somewhere near Ploegsteert, but the ground here was quiet, as if the earth itself was holding its breath.

The soft-faced one had done the talking. That was how it usually worked. The brutes grabbed, the cowards confessed.

“Give us the hook,” he had said, his voice cracking like a boy’s. “The blue-eye wants it. You don’t want to keep it. It’s not yours to keep.”

Émile had laughed. He hadn’t meant to. It came out as a short, ugly bark in the dark, and it had startled them both, which was why the first swing missed his head and clipped his shoulder instead. He had fought miners’ fights before—dirty, close, no rules. He had dropped the bigger one with a headbutt that split his own brow, and the blood was still dripping down his cheek now, into his collar.

But it was the other word that stopped him cold. Blue-eye. He’d turned it over in his mouth as he wrestled the knife out of the soft one’s hand.

“Who’s the blue-eye?” he’d asked.

The soft one had whimpered. The big one, facedown in the dirt, had answered through his broken nose. “Moreau’s man. The Hun major. Von Reitrich. He’s the one pays. He’s the one wants the tunnels drowned.”

Émile had gone very still. The words hung in the air like cordite after a shell.

Moreau was dead, but his hand reached back from the grave. And this von Reitrich—German high command, the soft one added, because he could not stop talking once he started—had been in correspondence with Moreau for months. French engineer and German major, meeting in neutral cellars and abandoned barns, dividing the underground between them like a disputed inheritance.

“They was going to flood it,” the soft one whispered. “The whole mess of it. Hill 60, Messines, all of it. Water comes up from the deep, they said. It’ll drown the tunnels and the witnesses and the gates and all.”

The big one groaned. “Shut your mouth.”

“He’s got a knife to my throat, you shut yours!”

Émile had asked the last question with the blade resting against the soft one’s jugular. “Where is this von Reitrich now?”

“Vosges,” the soft one gasped. “He’s got his own tunnel there. Own machine. Twin to the one under the hill. He was gonna use it to ring the bell, same as Moreau. One at each end, both sides of France, singing together. Then the whole underside comes down.”

Émile had not killed them. He had stripped them of their belts and their boots and their pistols, and he had shoved them into the cellar, and he had bolted the door. They would be found. Someone would decide what to do with two deserters who had signed on with a dead man’s ghost. That wasn’t his problem now.

His problem was bigger than a cellar and darker than two terrified men.

He wiped the blood from his brow and looked down. His hands were shaking. Not from fear—from the weight of what he now knew. The machine beneath Hill 60 was not alone. There was a second one, deep under the Vosges, under the French front in Alsace, and a German major with a French engineer’s blessing meant to fire them both. If they did, the flood would not be a local accident. It would be a swallow. The entire underground—the galleries, the ancient cities, the gates, the wardens, the men called and the men trapped—all of it erased under a rising tide that would burst upward through the trenches and take both armies with it.

And no one would ever know why.

Émile turned from the cellar and walked back down the passage toward the daylight. He had left his rifle with the guards at the perimeter—he was a sergeant on a mapping detail, he was not supposed to need a weapon inside his own lines—and he found he did not want one now. A rifle was not the answer. The medallion was. The hook, the key, whatever Cyrille had called it.

He passed through the blown-out arch of the factory and out into the grey dusk. The plateau stretched before him, scarred and silent. Somewhere beneath his feet, the galleries ran east and west, north and south, a whole world of stone and shadow and trapped men. Antoine was down there. Jean Delcourt was down there. And a machine was down there, waiting for a second bell to ring.

Émile reached up and touched the medallion through his tunic. The hook pressed against his palm, unreadable as scripture.

Moreau was dead. Von Reitrich was not.

That was the sum of it. A dead ally and a living enemy, and between them a plan to drown the world that no one above ground believed in.

He started walking toward the camp, his boots crunching on the chalk of the road. The guns stuttered in the distance. The ground under his feet felt hollow, resonant, like a drum waiting for a single touch.