Japan, the southernmost island Z.Miwako, an investigator who came to this island alone in pursuit of a series of disappearances of school girls on the mainland.She was greeted by the local investigator Oki, but perhaps because of the slow flow of time on the island, Oki didn't seem to be nervous.Meanwhile, Oki warns Miwako, who is caught up in the investigation. "This is a scary island. It's for your own good if you listen to what I'm saying..." Miwako begins to investigate her in the downtown area at night, leaving her uneasy.She never imagined that a few hours later, she would experience the same horror as the missing person...