Nightmare noir about a serial killer who haunts Tokyo's subways. Setsuko (Minami) is a criminal psychologist investigating the murders of several young women, all committed during rush hour at various commuter stops. Each victim has been killed with a poisonous injection. Setsuko learns the first victim was psychologically deprogrammed after leaving a religious cult and contacts her ex-lover, Rei (Wakamatsu), who runs a clinic specializing in such deprogramming. But Rei also becomes the chief suspect when he begins to play sadistic mind games with Setsuko. Is she paranoid or truly in danger? Japanese with subtitles.