Stamen, a civil engineer, gets a new assignment. He has to leave the capital and his friends and go to the construction site of a huge dam. On the train he meets Katya. He thinks she is an actress....

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.