When typical Japanese high school student Rika skips school to visit her grandfather, she fails to take into account the fact that his remote village is infested with the living dead.

Rookie detective Saki and her partner, veteran detective Hirai, are in charge of a case involving the confinement and rape of young women. The only clue is a toy necklace left at the scene. They also discover that the victims share the same date of birth. A former rapist then comes into the picture, but...