Descrip­tions

In 1990, an incident occurred when the residents of Yamijima Island disappeared one day. The only human being found on the island was a baby. Nearby, there was a scribble that says, "You must not turn off the light at the night of the siren."

After sixteen years, the growing baby, Yuki Amamoto, had nightmares of being attacked by strange monsters as a mysterious boy's voice speaks to her while the siren rings. In order to be free from her nightmares, Yuki accompanied folklore professor, Satoshi Tsuchida, and visited Yamijima Island at night. The ship heading to Yamijima that night also had the TV staff, Mikami and Hayashi, who chased after Tsuchida.

The group was attacked by monsters as soon as they set foot on the island. Despite feeling scared, Tsuchida and Yuki investigate the island. Eventually, when the sun had set and darkness covered the island, a dead samurai woke up, and the siren that rang in Yuki's nightmare began to resonate for real on the island.