In France, successful physician Charles Pelligrin (Fernandel) moves to the country and settles down with his wife, Armande (Claude Nollier), their children, and his mother. Despite the true happiness of his family life, Charles is surprised when a casual meeting with a vibrant young woman, Martine (Françoise Arnoul), stirs him into an eventual torrid affair. Unaware of Martine's calculated ambitions, Charles is also oblivious that his wife and his mother have discovered his illicit romance.