A man is too shy to ask a girl out and decides to kill himself. While lying in the road he is rescued by a Doctor who tries to cure him by implanting the heart of a rooster into him, something which suddenly makes him irresistible to women.
Auguste, a somewhat simple-minded Provençal fisherman, loves and admires Mireille. This concerns only Maurice, son of an important wholesaler, whom scruples do not stifle.
The reservist Lafleur, having a wife, a mistress and still running after the first petticoat that comes along, his namesake, an active soldier, finds himself embroiled in the vengeance or intrigues that all these women are plotting.
Pursued by a rival gang after a violent robbery, Toni escapes with nearly thirty million francs. On the train to Paris, to avoid arousing suspicion, he has no choice but to threaten an honorable philosophy professor, Justin Mignonnet, with his gun, so that he will carry the loot for him.
In the studio where the famous director Eric Von Berg reigns, Pierre Vanier, the male star of the film and the lover of Berg's muse, dies while rehearsing a scene.