During the summer holidays, the children's company gathers around the Rhine, but the curious boy Kārlis stays alone. The girl Herta comes from Riga to visit her relatives. She spends time with interest and listens to Karl's stories. The offended Reinis and his friends play an evil joke with Kārlis, wanting to laugh at the different boy.
| Actor | Role |
|---|---|
| RRoberts VilksKārlis | Kārlis |
| IIlze KļaviņaHerta | Herta |
| LLita DrēziņaNot listed | Not listed |
| JJuris KikinassNot listed | Not listed |
| AArnis SaulītisNot listed | Not listed |
| VVilmārs SokolovsNot listed | Not listed |
| DDinārs StundiņšNot listed | Not listed |