One day, Karen, a new teacher, visits the home of Hiroshi, a student in her class who refuses to come to school. Hiroshi had previously caused problems at school, and the school had given up on him, but he overcame the objections of his fellow teachers to come and make a home visit. However, as soon as Hiroshi welcomes Karen, he gives her tea laced with sleeping pills and overpowers her. Karen's father Koji and his bad friend Suzuki appear in the middle of the act, and the three of them gang-rape Karen...