Fifteen-year-old Kateřina will once again spend the holidays at the Castle Krabonoš, where her parents are both wardens. She finds it dull because she's got to sit at the castle's ticket office and sell tickets. That is, until the arrival of the new tour guide, Petr, a young history student. She falls in love at first sight. But for Petr she's just a young crazy girl. Katka tries to get Petr's attention in various ways, but all in vain. She makes a last ditch effort by pretending to steal some rare castle steins from the castle's collection. It's only after some detectives arrive that Katka realizes that she may have overdone it, but she finally manages to get Petr to notice her.

Sylva Julinová
Katka

Jan Hartl
Petr

František Husák
Katka's Father

Zdena Hadrbolcová
Katka's Mother
Jana Tomšů
Ida
Eva Holubová
Hanka

Tomáš Vacek
Tonda
Jiřina Jelenská
Těšíková

Stanislav Tříska
Gusta Těšík
Pavel Klůs
Pavluša

Jiří Tomek
policista
Josef Chvalina
učitel

Antonín Navrátil
policista

Pavel Kříž
Robert

Věra Tichánková
babička