Six people travel by overnight train from Marseilles to Paris. When they arrive, one of them, a young woman, is found dead in a sleeping berth. The police, led by Inspector Grazzi, investigate the other five passengers, suspecting that one among them was responsible. However, as the investigation is stepped up, the others start turning up dead. It's up to the remaining two to solve the case, lest they become the next victims.
Yves Montand
L'inspecteur Grazzi
Pierre Mondy
Le commissaire Tarquin
Jean-Louis Trintignant
Éric Grandin, étudiant vétérinaire
Jacques Perrin
Daniel
Catherine Allégret
Bambi
Simone Signoret
Eliane Darès, l'actrice éventée (Victime #4)
Claude Mann
Jean-Loup Gabert, inspecteur stagière de Grazzi
Michel Piccoli
René Cabourg, l'employé besogneux (Victime #2)
