Murdered and brought back as an undead Shikabane Hime, Makina Hoshimura owes her second chance to a contract with Buddhist monk Keisei Tagami: kill 108 corpses that refuse to stay dead, and she earns her way into heaven. The story opens as high schoolers exploring a burned-out, rumored-haunted building start encountering real corpses clawing their way toward them, drawing Makina in with dual submachine guns blazing. The manga runs the horror-action premise across the Kougon Sect's ongoing war with the reanimated dead.