Layton discovers the truth: the murdered officer was part of a secret network selling drugs into the Tail. More importantly, the killer is a hero—a Tailie named , who is also Layton’s former lover. But before he can expose her, she reveals an even deeper secret: the resistance has a new plan. They’ve found a way to jam the train’s doors open simultaneously.

The elite. They inhabit lavishly decorated cars: a sushi bar (using algae-based "fish"), a nightclub with hallucinogenic drugs, a library with leather-bound books, a sauna, and a garden car with real, growing flowers. They are cruel, decadent, and utterly convinced the train exists for their pleasure.

The Earth is not dead. The ice is melting, slowly, from the inside out. The train’s journey is over. A new one begins.

The engineers, farmers, and technicians. They have small private cabins, fresh vegetables from the hydroponic cars, and access to the "Bog," a murky pool for recreation. Their loyalty to Wilford is bought with comfort.