 Police commissioner Santamaria is investigating the murdering of the ambiguous architect Mr. Garrone. The investigations soon drive him into the Torino s high society. Santamaria suspect Anna Carla and at the same time falls in love for her. Lello is the lover of Massimo, a homosexual platonic friend of Anna Carla. He is following another direction in order to find out the truth, and his results are confusing the Policeman. But another murdering happens...