The story follows Commander Gérard and his band of guerrillas who have established a secret base in a mountain nursing home. To avoid detection by occupying Nazi forces, the fighters blend in with the mentally ill, leading to a "dialogue of the deaf" where the audience and characters alike struggle to distinguish true lunacy from calculated performance. The tension peaks as rumors of a "knockout punch" against the Nazis circulate and suspicion grows regarding a Swiss doctor who may be a German spy.

Released shortly after the liberation of France, (French: Un ami viendra ce soir ) is a 1946 thriller that explores the fine line between sanity and deception during wartime. Directed by Raymond Bernard , the film is set within an Alpine sanatorium where Resistance fighters hide in plain sight by posing as psychiatric patients. Plot Overview