The main character of this propaganda story is a farmer Mito Petrov, who joins an agricultural cooperative, but aspires to independent farming and cannot accept the innovations in agricultural work that are introduced by the management of the cooperative. The village rich, seeing his discontent, want to use Petrov's Mito to harm the cooperative. Petrov gives in to their pressure and leaves the collective farm, but in the end he admits his mistake.

Plamen's parents are separated. His father is an old river wolf, his mother a nurse in the big city. The boy's longing for his father keeps him going. His studies don't go well. One day Plamen sneaks onto his father's barge and secretly sets sail with him. On this long and very interesting voyage, Plamen befriends his father, and when they have to return to Varna, the boy is happy: he hopes that all three of them will be together again.