The gripping journey commences with a frantic flight from a city ravaged by a severe infection. A diverse group of survivors, each carrying their own heart-wrenching tales, hastily boards a heavily armored train, clinging to the hope of reaching a supposed safe haven situated far from the surrounding devastation. Among the passengers is a tormented former military officer grappling with haunting memories, a determined single mother striving to shield her young child, and an astute young woman on a mission to locate her missing brother.
As the train hurtles toward what they hope is safety, tensions begin to escalate within the close-knit group. With limited resources at their disposal, the bond of trust starts to fray as they encounter external dangers from the undead, as well as internal strife fueled by panic and despair. The survivors are compelled to confront their inner demons and face tough decisions, exposing the extraordinary lengths they are prepared to go to in order to stay alive.