The family of Prague burgher and master interior decorator Václav Kondelík lives happily in their house on Ječná Street. The peace is disturbed by an invitation to an "apron party", where their daughter Pepička meets a young municipal official, František Vejvara. The two young people fall in love. Their relationship is also supported by Mrs. Kondelíková, because Vejvara could become a welcome groom for her daughter. However, Pepička's acquaintance disrupts the established order of Kondelík's life.

Teacher František Kmoch is suspended because he plays at dances or composes at night. He forms a band in Kolín and his supporter Baron Hrubý helps him perform in public. His music is popular not only at home but also around the world...

Summer 1916. A transport of Russian prisoners of war passes through Brno. The health of Russian officer Ryepkin deteriorates so much that he is taken to an Austrian military hospital. He almost dies and needs a transfusion. The German nurse Mathilda is the only one with the same blood type. However, because she hates everything Slavic, she hesitates to help and the chief physician, MUDr. Šrámek, has to remind her of her human duty.

The likeable and charming Vanda Karhanová has problems in every job because of her appearance. So when she is about to start a new job, she decides to decisively prevent similar problems. She adjusts and dresses in a way that men do not notice her and do not pay attention to her. She has no idea that she will cause even more problems for herself, and not only because she now bears an uncanny resemblance to the millionaire Czech-American Ruth Baretová, who ran away from home to avoid getting married. First, Vanda is mistakenly arrested and ends up in the police station, so she cannot return to work. At the factory, they suspect her of having disappeared with a large sum of money that they had entrusted to her to deposit in the bank. Then the whole situation is complicated by the arrival of the real Miss Baretová.