A dramatic story of jealousy involves two young people: long engaged, he does not accept the end of the love, and above all jealousy blinds him; the girl after some initial signs of violence from her ex reports him to the police of the district, but then reconsidering withdraws the complaint: this unfortunately will cost her life: her ex discovers her with her new lover stabs her; desperate he will attempt suicide but this time the officers will stop him. Giovanna confronts Saro, Manrico is close to her. Scalise would like to convince the boy to collaborate but to no avail. Saro and Laura are being watched. They want to escape and the girl, having learned from her boyfriend the whole truth about the attack, would still like to stay with him and escape; but Saro, having arrived at Laura's, is surprised by his future executioner: Vito Tonnara who kills him in cold blood in front of Laura and then escapes from the precinct officers.