The heroine of this funny film is the daughter of a strange natural doctor Zvonimir Repa, who brings up the girl in a very strict and old-world way. His friend's son Karel Pavlovsky, a sporty young man, comes to visit. The desire of both fathers is to bring the children together. However, Karel does not want to hear about it, he longs for a modern girl who would share his interests. Miroslava is unhappy, because she likes Karel. She decides to change, and her uncle Ambroz becomes her support and mentor.