Melanie manages to cut Wilford's uplink to Snowpiercer's systems and discovers that it is snowing outside despite the temperature being too cold for it.

Layton and Roche learn from Kevin that there are only around a hundred people on Big Alice and that there is a food shortage; Wilford later trades Melanie for Kevin, but he seemingly compels Kevin to commit suicide for revealing secrets.

Layton suggests a trade of food for much-needed supplies to repair Snowpiercer and forges an alliance with Bennett to keep the train safe in Melanie's absence.

Wilford offers to treat Snowpiercer's frostbite patients so Layton invites Wilford and his crew for a night out on Snowpiercer; Josie's frostbite proves to be severe enough that she requires a more dedicated treatment on Big Alice, however.

As the trains prepare to turn around, Melanie fails to make contact with the latest weather balloon, sparking fears that she has perished; the crew decide to keep this a secret in order to keep hope alive.

In flashbacks, Melanie and Wilford argue about which people to save as the Freeze gets worse; after Wilford has the Jackboots kill innocent people trying to board the train, Melanie reluctantly decides to steal Snowpiercer and leave Wilford behind.

Alex finds herself excluded by Wilford due to her divided loyalties; Miss Audrey is enlisted by Wilford to treat a still-alive but traumatized Kevin, turning him into a fully-brainwashed follower of Wilford.

LJ and Oz continue to work in janitorial and begin forming a romantic relationship; Josie continues to recover and begins displaying a resistance to cold temperatures similar to Icy Bob who Wilford has sabotage Snowpiercer's snow intake, but Icy Bob dies as a result.

In the aftermath of Wilford taking control of Snowpiercer, Layton is forced to work in Compost on Big Alice while Javi works in Big Alice's Engine under guard with Bennett doing the same on Snowpiercer.

Layton and Ruth manage to escape and take over the Engine with Alex's help while Bennett subdues Sykes but the plan goes awry after LJ warns Wilford; Javi is mauled by Wilford's dog Jupiter and Wilford is able to prevent them from picking up Melanie.