The steam-powered fortress becomes a coffin when the Kabane breach it. Ikoma's infection transforms him from powerless rail worker into something caught between human and monster, forced to fight creatures that shouldn't exist while his own body becomes the enemy. The series takes the siege-horror premise seriously: every barrier falls, every hope cracks, every victory costs blood that won't come back.
Undead creatures called Kabane ravage the land, turning anyone they bite into one of the infected. Humanity survives behind massive fortress stations, sealed away from the horrors outside. But some people refuse to hide. They board armored trains that punch through infected territories, carrying supplies and hope between the barricaded settlements. This film recuts the story of those brave or desperate enough to venture beyond the walls. Following a cast of fighters, engineers, and survivors, it traces how ordinary people become warriors in a world where one bite means transformation into something inhuman. The tension never lets up: every journey outside the fortresses risks infection, every settlement could fall, every decision carries weight. What emerges is a brutal portrait of survival against impossible odds. The action is visceral and the stakes feel real because they center on characters trying to hold onto their humanity while fighting for it. New scenes and an alternate ending give the film its own identity separate from the original series, making it worth experiencing even for those who know the story.