Giampaolo Petrone, the openly gay owner of a nightclub, is found dead. The man was not in close contact with his family, who had never accepted the fact that he was gay, and so Inspector Ferro begins questioning his circle of friends and acquaintances.

On the night that she was killed, Irene played her final concert. First violin in an orchestra and the daughter of Adele Rubini, the owner of a prestigious theatre, she was a talented and beautiful young woman.