Eighteen-year-old factory worker's daughter Věra Janáková is head over heels in love with the famous pilot Jiří Málek. She only knows him from a photograph, but that's enough for her to run away from the boarding house and set out to find him. There, she discovers that the old Málek family are expecting the arrival of a girl from the orphanage, from whom they intend to raise Jiří's future wife. Enterprising Věra doesn't hesitate and quickly disguises herself as a thirteen-year-old frog...

Silvestr Blažek loses his job, but he doesn't lose heart. He also courts the saleswoman Boženka Straková. The driver of the builder Herold, Karel Verner, is also interested in the girl. Boženka is the daughter of Narcis Straka, a man with a mysterious past. However, Herold's father-in-law Jakub Suldovský recognizes him as an old friend from Vienna, where they both loved the same woman....

Shortly before the end of World War II, a small town is home to a portly miller who bears an uncanny resemblance to the tall Nazi leader. Of course, the two men will be confused, especially when the Czech patriot dresses up in an enemy uniform - he will cause confusion not only among the Germans, but also among the Czech collaborators.