In a dusty, western-flavored frontier, young pickpocket Elwood Shepherd tries to rob the powder hunter Gamma Akutabi and ends up joining him instead. Gamma, who wields a chainsaw-sword and a steel right arm, hunts the twelve Rings of the Dead, the cursed artifacts that together yield the Zombie Powder said to raise the dead and grant immortality. Alongside Gamma's gunslinging partner C.T. Smith, Elwood chases the rings hoping to bring back his sister Sheryl.