Playing at Love

In the beginning of the Twentieth Century, in Vienna, Dragoon Lieutenant Fritz Lobheimer and Second Lieutenant Theo Kaiser are at the opera when a girl accidentally drops her opera glass. Fritz has a love affair with Baroness von Aggersdorf and leaves the opera house to encounter her. Her suspicious husband, Baron von Aggersdorf, leaves the opera earlier expecting to catch his wife with her lover but is unsuccessful. Lt. Kaise meets the two girls, Mitzi Schlager and Christine Weiring, looking for the glass and invites them to go to a cafeteria. Meanwhile, Fritz gives his key to the Baroness and flees from her house. He meets the trio at the cafeteria and while Theo and Mitzi go to his apartment, Fritz walks Christine home. Theo schedules a double date and soon Fritz and Christine fall in love with each other, and Fritz looks for Baroness von Aggersdorf to end their affair. However, the military Graf von Aggersdorf tells his brother, Baron von Aggersdorf, the rumors about the relationship of Fritz and his wife. He finds her key and challenges Fritz to a duel, with tragic consequences.