Grand Duke Konstanty marries Countess Joanna Grudzińska. However, Joanna still loves Major Łukasiński, and she agreed to the marriage out of a sense of patriotic duty. Łukasiński is arrested. The November Uprising breaks out. The conspirators capture Belweder Palace. Joanna hides Konstanty from them.

Fioretta, who works at the circus, is the favorite of the entire staff. Her beauty and charm do not go unnoticed by outsiders either, and the wealthy industrialist Eugeniusz Rańcewicz begins to take an interest in her. Fascinated by her, he abandons his plans to marry another woman. One day, gypsies set fire to the circus grounds and steal Fioretta's two favorite horses. Livenzo comes to her aid.