The film's story is told in a series of flashbacks. In the opening scenes, Iwao Enokizu (Ken Ogata), is a prisoner of the police. A huge crowd of journalists and an angry mob greet him as he enters a cell. The police interrogates him but he refuses to answer. The story goes back to the initial murders. Enokizu tricks and then kills two men and steals a large sum of money. He puts on a suit and disappears. Enokizu travels to another city. At the train station, he asks a taxi driver to take him to an inn where he can get a prostitute. Enokizu is sexually insatiable. He tells the innkeeper, a woman called Haru (Mayumi Ogawa), that he is a professor at Kyoto University. The police, searching for Enokizu, put out bulletins with his face on television. The prostitute thinks the professor is Enokizu, but she is told not to go to the police because of her job.