Robert Avranche, a middle-aged, alcoholic garage owner, is sitting on a train, reflecting on the emptiness of his life. An attractive young woman, Donatienne, suddenly enters the compartment and offers to make love to him. Robert accepts but, when the woman leaves the train afterwards, he decides to follow her...
Alain Delon
as Robert Avranche
Nathalie Baye
as Donatienne Pouget / Marie-Thérèse Chatelard / Geneviève Avranche
Gérard Darmon
as Duval
Geneviève Fontanel
as Madeleine Pecqueur
Michel Galabru
as Emile Pecqueur
Jean-Pierre Darroussin
as le second passager
Sabine Haudepin
as Carmen
Vincent Lindon
as Brechet
Jean Reno
as A neighbour
Ginette Garcin
as The florist
Bernard Farcy
as Farid
Paul Guers
as Clark
