Screenwriter Philippe (Duchaussoy) imagines a crime committed by his wife Sylvie (Delon) and a mutual friend Pierre (Serre): a dead body is put in a trunk but the hand sticks out. Sylvie and Pierre begin to have an affair and things get very dangerous and the imaginary crime is on its way to becoming prophetic.
Philippe Andrieux
Pierre Espérou
Sylvie
Le chiffonnier / Le psychanalyste
La mère
Marco / Le cycliste
Lydia
Le professeur
L'inspecteur des grands magasins / Frascati
Le gendarme