Prisoners of the Ghostland (2021)

In a region of Japan devastated and quarantined years ago following an accident in which highly volatile nuclear waste was spilled after a crash between the waste transport and a prison bus, a settlement called Samurai Town is ruled by an unscrupulous Governor who has blended elements of Japanese society (both modern-day and pre-modern) and the old American West together at his whim, and is keeping a harem of adopted "granddaughters" as his sex slaves. The outside is a wasteland known as the Ghostland, inhabited by half-crazed outcasts and victims of the irradiated environment. Just before the catastrophe, Hero, a criminal, was imprisoned in the aftermath of a botched bank robbery where his partner Psycho brutally murdered several innocent bystanders. It is later revealed that Psycho was in the prison transport which collided with the waste truck and thus set off the disaster.

One night, Bernice, one of the "granddaughters", flees from the Governor's house with her friends Stella and Nanci, only to get stranded in the Ghostland. The Governor has Hero released to retrieve Bernice from the Ghostland, and outfits him with a bodysuit which is set to detonate explosive charges in case he mistreats Bernice in any way, the suit itself is tampered with, or Bernice has not been rescued within five days. When departing, Hero undertakes a parting gesture of defiance against the Governor which impresses Yasujiro, the Governor's samurai bodyguard whose sister is one of the Governor's "granddaughters".

Upon entering the Ghostland, Hero is intercepted by a band of mutated men, suffers an accident, and is taken by the outcasts to their cult-like enclave and their leader, Enoch. He finds Bernice among them, but she is half-catatonic from trauma. As he prepares to transport her back, Hero accidentally triggers one of his suit's explosives, which destroys one of his testicles and renders him unconscious. In a nightmare flashback, Hero recognizes Bernice as a young girl whose mother was killed while he tried to escape the police after the bank robbery and who was subsequently taken in by the Governor. Attacked by the mutants from earlier, Hero is rendered unconscious when an explosive on his arm is set off, just before the assailants vanish. However, the detonation shakes Bernice from her catatonia.

Meanwhile, Stella returns from the Ghostland and is captured by the Governor's men, who has Yasujiro execute her, which finally turns him against the Governor. Having had a revelation during his unconsciousness about his accidental role in the cataclysm, Hero stirs the Ghostlanders into a revolt against the Governor, aided by Psycho and the mutants, his fellow convicts from the fateful accident. Hero and Bernice return to Samurai Town, but when the Governor refuses to unlock the suit and Hero pretends to take Bernice hostage, Bernice's friend Susie, traumatized from the Governor's treatment of her, massacres several of his bodyguards with a minigun. Hero, Bernice, and Yasujiro overcome the remainder, then Hero faces off against and kills Yasujiro while Bernice shoots the Governor. With the oppressor dead and the outcasts liberated, Hero, Bernice, and Susie watch as Samurai Town begins to stir with new, freer life.