Leo and Ulrich are lifelong best friends. Home, on leave from their military training, Leo sees the beautiful Felicitas at the railroad station. Awed by her beauty, they meet again at the ball and quietly leave together. In her home, her husband, about whom she has neglected to inform Leo, comes in, catches the two together, and challenges Leo to a duel. The duel is done, the husband is killed, and Felicitas is a widow. Leo, however, is "requested" by his military superior to serve 5 years in Africa and he tells Ulrich to watch over Felicitas while he is gone. After 3 years, Ulrich is able to get a pardon for Leo, and all that Leo thinks about on the way home is Felicitas. When he arrives, he learns that Felicitas has married Ulrich. Leo tries to stay away from her, but Felicitas uses every opportunity to tempt him to return to her as her lover. She creates a deadly triangle with the two lifelong friends.