Japan, the southernmost island of Z──. After a series of high school girls' disappearances on the mainland, investigator Miwako travels alone to this island. She is greeted by local investigator Ooki, but due to the relaxed pace of life on the island, he doesn't seem tense. Amidst this, as Miwako eagerly starts her investigation, Ooki warns her, "This is a scary island. It would be better for you if you listened to what I say..." Leaving her with unease, Miwako begins her door-to-door inquiries in the bustling night streets. Little did she imagine that just a few hours later, she herself would experience the same terror as the missing girls…
