The illegitimate child, Marie Růžová, grows up in the family of the Bořický miller. Childhood and youth spend with the son of Bořice, Klement. Klement asserts the rights, becomes a lawyer, and marries Jirina. In order not to cause further contradictions, Mary will go to Prague secretly at night. There he is living heavily as a waitress. He resists the insults of architect Jansky until he ultimately decides to commit suicide in despair.

Postman Brabec is a welcome guest of the revue theatre for his sense of humor, and he brings his director Holt letters from female admirers every day. Holt's fans include Brabec's sister Anny. The girl would like to join the theatre, but for the time being works as a maid for the actress Velden. A new revue is being rehearsed, the name of the author is secret. Veldenová will return the role just before the premiere because she doesn't like it. The quick-witted Brabec introduces the director to his sister, who knows all the parts by heart.