Adolf Junkers has information about the serial murders that is vital to the police, but he is afraid to reveal them. Dr. Tenma's care for Adolf Junkers however wins him over. His close relationship with Junkers however leads him to a night of shocking horror.

Tenma encounters a burglar named Heckel who claims to have seen the killer. It soon results in Heckel leading Tenma to a couple of murderers.