In Vienna during the restoration, a young officer, Carl von Heymendorf, bets his two friends ten bottles of champagne that he can present a new conquest by the next day. He makes a pass at Franzi, his aunt's new chamber-maid, but she refuses him. Still, Carl brags about a 'conquest' in front of his friends. A young composer, who was also turned down by Franzi, happens to overhear the scene. He writes a satirical song about Vienna's immoral chamber-maids, a song that becomes a hit. At the Radetzky ball, Carl falls in love with a fellow aristocrat, while Franzi is swept off her feet by the composer.