A group of students from the Cosmo Academy are about to take their final exam: surviving for over fifty days in a derelict ship. But when they arrive, they discover that instead of ten students, there are eleven. One of them doesn't belong there...
Three high-school students tangle with indulgent yakuza and lackadaisical police as they set out in search of the class bully, who has been kidnapped.
O-Shin is a young brothel worker who, one night, helps a young samurai escape from his pursuers. Against the warnings of her fellow workers, particularly Kikuno and the brothel's owner, O-Shin falls in love with the samurai.
