A married man who killed the wife of his best friend during a tryst feels compelled to turn himself in.
| Actor | Role |
|---|---|
 Stéphane AudranHélène Masson | Hélène Masson |
 Michel BouquetCharles Masson | Charles Masson |
 François PérierFrançois Tellier | François Tellier |
 Henri AttalCavanna | Cavanna |
 Jean CarmetJeannot | Jeannot |
 Dominique ZardiPrince | Prince |
| BBrigitte PérinJoséphine Masson | Joséphine Masson |
| PPascal GillotAuguste Masson | Auguste Masson |
 Anna DoukingLaure Tellier | Laure Tellier |
 Daniel LecourtoisDorfmann | Dorfmann |
| PPaul TempsBardin | Bardin |
 Roger LumontCommissaire Delfeil | Commissaire Delfeil |
 Marina NinchiGina Mallardi | Gina Mallardi |
| GGilbert ServierUn policier | Un policier |
 Dominique MarcasMme Ortiz | Mme Ortiz |
 Marcel GassoukBarman | Barman |
 Clelia MataniaMme Masson | Mme Masson |