Sicily, 1865. Two peasants, Gramigna and his father are tricked by Baron Nardò and robbed of their field, which then the baron lets to Assunta, her daughter Gemma and her fiancé Ramarro. Determined to take revenge, Gramigna begins to hunt down Nardò's complicit mediators. Unbeknownst to Gramigna, Gemma, to escape her arranged marriage, goes after him. Love and violence will follow all till their desperate ends.
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.
The boy Stefan brings the supper to his father in village council office. From the frontier post comes the news that bandits have crossed the border. The boy goes back home. He and his sister prepare to go to bed. A blizzard is raging outside. A wounded stranger comes to the house in search of shelter. The mother dresses his wounds and gives him food. It becomes clear that he is not the lieutenant from the frontier post that he claims to be. Stefan jumps from the window and dashes to the frontier post. The mother tries to keep the saboteur as long as possible. The two quarrels. He hits her with the submachine gun. He attempts to escape, but the border guards have already surrounded the house.
