School principal Ozawa Gozo rapes his daughter, Mitsuko, after she sees her parents having sex. Her mother Sayuri witnesses the rape. Gozo now rapes both of them as he pleases, while his family is undermined by incest, suicide, and murder. This is the erotic novel that novelist Taeko, who uses a wheelchair, sets out to write. She is assisted by Yuji, a young man who is actually on a mission to uncover the reality of this story of Taeko's past, and of the locked room in her apartment. But the reality and truth beneath the Grand Guignol nightmares Taeko creates might be too much to bear.