The heroine of the story is a teenage Jitka Pažoutová, suffering from her fatness and clumsiness. For her, the real torture is especially the gym classes led by a sympathetic gym teacher, nicknamed Bohoušek by the girls. A change for the better is a dodgeball match, which the girls win thanks to Jitka's "guns", which simply cannot be caught. At the tournament, Jitka meets Honza Koubek - a boy who insults her, but then apologizes to her and persuades her to try using her strength in the shot put...
| Actor | Role |
|---|---|
| MMarkéta SvětlíkováNot listed | Not listed |
 Míla MyslíkováNot listed | Not listed |
 Lubomír LipskýNot listed | Not listed |
 Jaromír HanzlíkNot listed | Not listed |
 Helena RůžičkováNot listed | Not listed |
| ZZora RozsypalováNot listed | Not listed |
 Ladislav MrkvičkaNot listed | Not listed |
 Vítězslav JandákNot listed | Not listed |
 Jiří ValaNot listed | Not listed |
 Jan VostrčilNot listed | Not listed |
| MMarcela ChlupováNot listed | Not listed |
| AAlena JurášováNina | Nina |
| MMarie NocarováNot listed | Not listed |
| ZZdeněk SzamkoPetr | Petr |
| JJan SchmedkaNot listed | Not listed |
| VVěra BaťkováNot listed | Not listed |
 Stanislav TřískaNot listed | Not listed |
 Libuše ŠafránkováNina (voice) | Nina (voice) |
 Ivan VyskočilPetr (voice) | Petr (voice) |