Gervais escapes from a German concentration camp and assumes the identity of a recently deceased fellow prisoner. Knowing that the dead man has been carrying on a romance by correspondence with Hélène, whom he has never seen, Gervais makes the acquaintance of the woman and they move in, but her sister Agnès dabbles in the black arts, which should be warning enough for Gervais to make himself scarce. Yet he sticks around, intrigued that the dead man's sister, Julia, refuses to blow the whistle on him.
François Périer
as Gervais Larauch / Bernard Pradal
Micheline Presle
as Hélène Vanaux
Jeanne Moreau
as Agnès Vanaux
Madeleine Robinson
as Julia Pradal
Marc Cassot
as Bernard Pradal
Pierre Mondy
as André Vilsan
Paul Faivre
as Doctor Jaume
Louis Arbessier
as Police Commissioner Drouin
Simone Angèle
as Eulalie, boss of the inn
Jo Peignot
as Pharmacist
Clément Harari
as Pharmacist's Assistant
Paul Barge
as
