On the longest night of winter, the monster is not the one in chains.
1906 - Dr. Anya Morozova boards the westbound Siberian express carrying a case of medical specimens-and the remains of a career stolen by the men who trained her.Before morning, a passenger is found torn apart inside a compartment bolted from within. The wounds suggest an animal. The missing tissue suggests a surgeon.
Suspicion falls upon Nikolai Volkov, the train's imposing conductor. Every night, he disappears into the black final carriage, where iron restraints wait beneath covered windows. Nikolai is dangerous. He is also the only suspect who could not have committed the second murder.
As a blizzard traps the train in the Siberian wilderness, Anya discovers that someone aboard has been selecting passengers for an experiment in human regeneration. Its final ingredient lives inside Nikolai's bones.
He can hear her heartbeat. He can smell her desire. And he knows exactly what will happen when the full moon rises.
To survive, Anya must trust the man who fears touching her, release the creature he has spent years containing, and discover whether the chains are protecting the passengers from the monster-or protecting the real killer from him.
A seductive historical horror novella about ambition, restraint, and the dangerous intimacy of being trusted with the key.