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When Maria Mancuso dies suddenly before the expiration of her life-insurance policy, the insurance company sends lawyer Nanni Brà (Philippe Leroy) to investigate. He seduces Cinzia (Paola Pitagora), one of the late woman's daughters, in order to obtain more information. When he falls in love with the girl, he confesses to her his original intentions and she tries to take her own life. Nanni discovers that Maria Mancuso was murdered; Cinzia admits to the crime, then crashes the car with herself and Nanni into a truck, killing them both.