Lucretia and her brother Cesare lead a life full of perverse love affairs. Once Lucretius meets a young man and falls in love with him. Cesare kills her lover. Lucretia is terrified. The brother, in order to distract her, arranges a feast, during which the killers hired by Lucretia burst into the hall. Standing over her dying brother, the girl laughs - she took revenge! But she forgot about the cunning of Cesare: the wine she drank was poisoned.