Franco (Philippe Leroy), a wealthy and attractive businessman whose marriage to his wife Laura (Didi Perego) is suffering from severe marital dissatisfaction, finds his domestic life upended when his son brings home his young, beautiful new bride, Flora (Simonetta Stefanelli). Tensions and mutual attractions mount within the household, leading Franco to give in to his intense desire and engage in a passionate, secret affair with his own daughter-in-law.