A group of 6th grade school children master their everyday lives. Van'ka has inventive talent, but he can't cope in class. His loyal friend Aleša tries to protect him. The curious and ambitious Katja thinks Van'ka is lazy, but she also has some problems at school due to her great commitment to the pioneer group, of which all three of them are members. Will Van’ka and Katja successfully complete the school year or have to repeat the 6th grade?
| Actor | Role |
|---|---|
| OOleksii KharlamovAlim Ivanovich | Alim Ivanovich |
 Lidiya MatsiyevskayaMother | Mother |
 Ivan TverdokhlibSchool guard | School guard |
| KKlavdiya DombrovskayaMarishka | Marishka |
| SS. PeltikVanka | Vanka |
| VV. YavorskayaKatya | Katya |
| AA. ZaychenkoAlyosha | Alyosha |
| MMaria SidorovaNina Petrovna | Nina Petrovna |
 V. PiddubnyiKolkhoz chairman (uncredited) | Kolkhoz chairman (uncredited) |