In the future, the Japanese government captures a class of ninth-grade students and forces them to kill each other under the revolutionary "Battle Royale" act.

Weaving two storylines together: the first is the story of 18th-century shogunate intrigue and loyalty, and the second is a ghost story about a beautiful woman who falls victim to passion and evil.

911 receives a call from a young woman reporting the death of an acquaintance at a hotel, and Detectives Ushio and Ogami of Shinjuku West Police Station rush to the scene!! The caller is eventually identified as Megumi, a woman whom Detective Ushio's wife Sumie had met by chance, but Megumi too has been killed...