La Peau de l'ours (1957)
Directed by Claude Boissol

Film Synopsis

49-year-old police officer Étienne Ledru leads an harmonious existence at his a villa in St. Germain-en-Laye, in the company of his ravishing second wife Anne-Marie, his two children Philippe and Juliette, his cheerful mother-in-law Madame Legrand and maid Janine.  One day, Ledru begins experiencing the same faintness that he had felt some time ago, but in a more persistent way.  Concerned, he visits his doctor, Chauvin, who recommends that he takes some more extensive tests.  These reveal that Ledru has been poisoned, but by whom?  The culprit can only be someone in his family circle!  Faced with a terrible dilemma, Ledru begins his own private investigation.  He must spy on each member of his household in turn in the hope if uncovering some hidden motive.  By a process of elimination he is sure to identify the poisoner...