

Police Comissioner Datti is investigating the murder of a female doctor whose murderer seems to be a thirty-fivish year old man. Soon another murder follows: Pianist Robert Dominici's girlfriend is found killed. The killer also challenges Datti on the phone and says he can't be caught since he has a secret which makes him invulnerable. In the meantime the clues seems to point in strange directions...
Robert Dominici

Hélène Martell

Inspector Datti

Susanna

Davide

Agent Marchi

Gloria Datti

Dr. Carla Pesenti

Dr. Vanni
Robert's Mother

Chief Physician
Agent Corsi
Father Giuliano

Inspector

Aging Expert

Unknown Role

Andrea

Danzil, a Cop

Swordmaster

Unknown Role

Laura, Venice Prostitute

Unknown Role
Mother (uncredited)

Man in Police Line-Up (uncredited)

Party Guest (uncredited)

Woman at Robert's Piano Concert (uncredited)

Man That Gets on Moped at Station (uncredited)

Man at Robert's Piano Concert (uncredited)

Man in Restroom (uncredited)
