Chapter 1 - Compartment 7
Eleven o'clock at night. The rhythmic, cold screech of steel wheels grinding against the iron tracks echoed like the relentless ticking of a monstrous pendulum. The night express L'Étoile du Nord was barreling through the foggy, bleak borderlands between France and Belgium. November’s persistent, biting rain clung to the glass windows, blurring the outside world into a continuous smear of black ink. This was a non-stop night express; the journey required four hours of continuous, uninterrupted travel from Gare du Nord to Brussels. According to the strict railway schedule, it wouldn't be until exactly two-thirty in the morning that the heavy steam locomotive would finally slow down to enter the next station.
Inside the narrow corridor of Sleeping Car 7, the air was thick with the scent of polished mahogany wood, damp wool carpets, and the heavy residue of tobacco smoke. Dim, amber wall lamps cast flickering halos down the wood-paneled walls, creating long, predatory shadows that danced with the train's sway.
Inspector Julien Vance, thirty-eight, walked slowly down the carpeted aisle, keeping his leather boots silent. He was a tall man with sharp, angular features and the piercing grey eyes of someone who had spent his youth dissecting the dark underbelly of human nature. Having just finished an uninspiring short holiday in Paris, he was returning to the federal police bureau in Brussels. He preferred night trains; their profound isolation matched his restless, analytical mind.
As Julien passed Compartment 7, the wooden door suddenly clicked open. The car conductor, an elderly, uniformed man named Roger, stumbled out. His face was stark white under his silver-trimmed cap, and sweat beaded heavily on his forehead. His hands shook so violently he almost dropped his brass lantern.
"What is the matter, Roger?" Julien asked, his detective instincts instantly flaring at the old man's visceral panic.
"Monsieur Inspector," Roger gasped, his breath hitching painfully. "Monsieur Grimaldi... the passenger in Compartment 7. He is gone. Completely gone."
Julien frowned, stepping past the trembling conductor to peer inside. It was a first-class single compartment. On the small, built-in wooden table next to the window, a porcelain cup of coffee still emitted a faint wispy curl of steam next to an open, face-down book. A heavy cashmere overcoat hung undisturbed from a brass hook. A premium leather suitcase rested safely on the overhead luggage rack. Everything indicated that the occupant had merely stepped out for a fraction of a second.
"Gone?" Julien repeated calmly, his voice steady but carrying an absolute, commanding weight. "Could he not simply be in the lavatory at the end of the corridor? Or perhaps he walked up to the dining car?"
"Impossible, sir," Roger shook his head frantically, his teeth chattering. "Fifteen minutes ago, Monsieur Grimaldi rang the service bell to request a glass of warm water. When I arrived and knocked twice, there was no answer. Thinking he had drifted off to sleep, I used my master key to unlock the door. The room was empty, just as you see it now. I immediately checked both lavatories at the ends of this car. Both were unlocked and empty. I even ran forward to Dining Car 6 and backward to Baggage Car 8. Nobody has seen a trace of him!"
Julien stepped fully into the small space, which measured no more than four square meters. He walked directly to the window, examining the heavy brass latch.
"What about the window?" Julien questioned.
"Locked tight from the inside, sir. It’s the standard spring-loaded sliding bolt of the night express. To open it from the outside requires a specialized maintenance wrench, and if opened from the inside while moving, the violent draft would have made a howling racket down the hall. I was sitting at my station desk right down the corridor, sir. The hallway was completely silent."
Julien nodded, his eyes scanning the primary door lock. This was a dual-axis mechanical latch used in luxury trains: the internal deadbolt was a thick brass lever. Once thrown from the inside, it physically blocked the external keyway, meaning even the conductor's master key could not bypass it. To enter a room locked like that from the outside required a specialized crowbar or an elaborate under-door manipulation tool.
"When you unlocked the door with your master key," Julien locked his eyes onto Roger, "what position was the internal deadbolt in?"
Roger swallowed hard, straining to remember. "It... it was not thrown, sir. The door was held only by the automatic spring latch that engages whenever the door is shut from either side. It means the door was simply closed, but not locked from within."
A critical clue. If the internal deadbolt was not engaged, it meant the victim had either stepped out voluntarily, or an intruder had entered, committed a crime, walked out, and pulled the door shut to let the automatic lock snap into place. But the fundamental question remained: where could a man vanish to on a train traveling at ninety kilometers per hour through a torrential downpour without a single stop?
Julien stepped back out into the narrow hall, looking in both directions. Sleeping Car 7 was an isolated unit. The heavy iron fire doors leading to Car 6 and Car 8 were fitted with thick glass observation panes.
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"Roger," Julien commanded, his voice hardening into an absolute professional clip. "Seal Compartment 7 immediately. Do not touch anything. Bring me the complete passenger manifest for this car. We have exactly three hours before the train pulls into Brussels. If Monsieur Grimaldi did not throw himself off the train into the freezing rain—which would be suicide—then he, or his body, is still inside this iron box. And so is his captor."
Julien drew his silver pocket watch from his vest. The long hand had just ticked past twelve. The hunt inside the speeding, locked room had officially begun.
