A hardened convict and a younger prisoner escape from a brutal prison in the middle of winter only to find themselves on an out-of-control train with a female railway worker while being pursued by the vengeful head of security.

Corky, a tough female ex-convict working on an apartment renovation in a Chicago building, meets a couple living next door, Caesar, a paranoid mobster, and Violet, his seductive girlfriend, who is immediately attracted to her.