1945. In the countryside near Normandy's beaches, Marie lives with her husband Jérôme, who is diffident to the war around him and unwilling to move his wife to Paris, where she longs to live, shop, and party. A German outfit is bivouacked at Jérôme and Marie's crumbling château because its commanding officer is pursuing Marie. She is also being eyed by a French spy working with the Allies as they plan D-Day. As he passionately woos her, he ends up forgetting his mission. Heroics come from an unexpected direction and Marie makes her choice.