Let me introduce. Trygve Yamamura is a private detective, judo expert and samurai sword expert. He represents a triple threat to crime in San Francisco, because his unusual skills allow him to keep his head, even during the investigation of the most unusual and mysterious crimes, such as the murder of Bruce Lombardi, a young assistant at a historical university, whose mutilated body was found the day before on old abandoned road near Berkeley University. Who might be interested in the death of a young man? What are his lover and older brother hiding, and what does the old Japanese sword have to do with it?