Follows the Bulgarian people's struggle for national independence in the period from 1875 to the Liberation from Otoman bondage.

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.

The wealthy Yurtalana is the undisputed master of his family. His older son Stoyko marries a poor girl - Sevda. On the wedding day, Stoyko tells her a dark family secret...

The university student Bobchev joins a youth brigade. The commander's council entrust Bobchev with a literacy course for members of the brigade. Velizarov and Monkata arrive in the camp to carry out sabotage. They place explosives on the dam, and attempt to win Bobchev over by means of intrigue. There is a storm: the camp is put on the alert. Everyone joins the rescue work at the dam. After a long struggle with Velizarov, Bobchev cuts the burning fuse of the explosive. The dam does not yield to the pressure of the flood. Everymen sing in Jubilation.

Captain Velkov was sent chief of a border post near the village of Novi Izvor, where he was a partisan. In Novi Izvor a celebration is being prepared to mark the switching on of the electricity. Saboteurs cut the cables, killed the watchman and set fire to the machinery on the farm.