France 1972, in a small provincial town, a vicious reputed notary falls in love with a sexy adventurer.

Benoît is a coward and a voyeur, who gets his kicks from watching other couples make out. He cajoles his two new companions to attempt what he has never dared do: rob the safe in his father's factory, seduce his stepmother to blackmail her for money and finally go so far as committing murder. Thus begins a wild ride that takes them to the very edge of madness.

Oliver has a wife and a mistress -- quelle surprise!! Maude, his wife, decides to let him have his fun as long as she can control them. She brings Florence, a very attractive 18 year old, to live with them and to seduce Oliver. The plan works, and Oliver soon gives up his mistress for the younger Florence. As the plot develops, Florence not only captivates and controls Oliver, but Maude as well.