Read Chapter 13: The Betrayal

The chalk dust hung thick as smoke in the flashlight beam. Émile pressed his back against the gallery wall, listening to the scrape of picks ahead—Moreau’s counter-mining crew, digging toward the German charge. Behind him, Félix crouched with the new men: Petit, a wiry bricoleur with a drooping moustache, and the brothers Garnier, both silent as stones since the cavern descent.

“This is wrong,” Petit whispered. “This chalk is wet. You can hear it groan.”

Émile could hear it too. A low, rhythmic creaking, like a ship’s hull under strain. An unstable gallery was a tomb waiting to close. Moreau knew it—he had the survey maps, the ones that showed the deep strata. Yet he had ordered the crew in anyway.

“Maybe the lieutenant wants a collapse,” Félix said quietly. “Breaks the German tunnel, seals the sector. One problem solved.”

“And buries us with it,” Émile said.

From ahead came a shout. Then the unmistakable crack of timber snapping. A roar of chalk and stone filled the passage, and the flashlight beams swung wildly as dust rolled over them in a thick, choking wave.

“Back!” Émile grabbed Félix by the coat and hauled him rearward. The galleries behind were a maze of shoring timbers and narrow turns. They ran blind, coughing, feet slipping on loose stone.

They burst into a wider junction, where the tunnel split three ways. Émile knew this place: it was on the tracing in his boot. The right-hand passage led to the ancient network. The left returned to the French lines.

And there, standing at the junction with a lantern and two armed men, was Lieutenant Moreau.

“Marchand,” Moreau said. His voice was calm, almost kind. “I was hoping you’d come this way.”

Émile stopped. The dust settled around them. Félix and the others fanned out, hands on their sidearms, but Moreau’s men already had rifles leveled.

“You sealed the gallery,” Émile said. It wasn’t a question.

“I gave the order to clear the unstable sector,” Moreau said. “Your disobedience made you a liability. You left your post. You took men into unauthorized ground. You found things that should not have been found.”

“The German charge is primed. If we don’t stop it—”

“The German charge has been rendered moot.” Moreau smiled. It was the smile of a man who had settled an account. “I made certain of that weeks ago. A quiet arrangement. They don’t want this sector destroyed any more than we do. They want something else entirely.”

Émile felt the floor shift beneath him—not physically, but in his understanding of the war. “You’ve been talking to the Germans.”

“Exchanging intelligence. A mutually beneficial silence.” Moreau stepped closer, lantern light casting his shadow long across the chalk. “You think this war is about territory, Marchand? Lines on maps? The politicians draw them, but the men like us—the ones who dig—we know what’s underneath. The Germans found it first. They mapped it. And they agreed, very reasonably, to share it with me in exchange for certain… courtesies.”

“You’re a traitor.”

Moreau laughed. “I’m a survivor. And you, my foolish sapper, are a scapegoat. Deserter. Thief. Saboteur. Whatever name they need by morning. Your brother will have company in the lists of the dishonored dead.”

The mention of Antoine struck like a blow to the chest. Moreau saw it, and his smile widened.

“Yes. I knew about your brother before you ever arrived. I read his file. He went down. He never came up. And now you’re determined to follow him.” He gestured to his men, who moved to flank the group. “That’s where you’ll go. Into the dark. And you’ll stay there.”

As Moreau’s men advanced, Félix moved. He had been edging sideways with the dust-filled crate—one of the spare demolition charges they’d brought from the cavern. He shoved it into Petit’s hands, then lunged at the nearest rifleman, catching the barrel and driving it upward.

The gun fired. The shot cracked against the low ceiling, bringing a rain of chalk and stone. In the confusion, Petit heaved the charge at Moreau’s feet. It clattered and rolled, unlit but heavy enough to make the two guards flinch back.

“Run!” Félix shouted.

Émile grabbed Petit and pulled him into the right-hand passage. Félix came behind, boots pounding. The Garnier brothers hesitated for half a heartbeat at the junction, and in that heartbeat Moreau’s men raised their rifles again.

Two shots. One of the brothers—the younger, whose name Émile never learned—crumpled to the floor. The other brother howled and fired back, one wild shot, then he was running too.

Behind them, Moreau called out, his voice echoing down the passage: “Close the gallery! Collapse it on them!”

A sharp series of hammer blows sounded above the din. They were setting charges. They were going to bury the passage.

Émile ran faster. The passage narrowed, then angled downward. The carvings began to appear on the walls—the same labyrinthine symbols from the cavern, spirals and branching roots. The Blue Madonna’s markings. The tracing in his boot felt warm even through the leather.

Another passage joined from the right, perfectly smooth-cut, older than the rest. He took it without thought, Félix and Petit and the remaining Garnier close behind.

The last thing Émile heard from the world above was the deep, muffled thump of a demolition charge sealing the gallery forever. Then there was only silence, and the pale gray glow of faintly phosphorescent moss along the ancient stones.

They stopped in a small chamber, breathing hard. Petit doubled over, gasping. Félix leaned against the wall, stripping the dust from his eyes. The surviving Garnier brother stood rigid, face pale, staring at the entrance they had come through as if the world had ended there.

Émile reached into his boot and pulled out the tracing. He unfolded it, holding it up to the faint glow. The full map—Moreau had taken it. But the tracing showed the network, the branching routes, the deeper channels that ran under the entire sector. What it didn’t show was where they were now, or whether any of these paths led anywhere alive.

“He has the map,” Petit said, voice hollow. “He has everything.”

Émile looked at the fragile tracing, then at the dark passage ahead.

“No,” he said. “I memorized the important parts.”