The film covers the period from 1903 to the mid-1920s. In the center of the epic narrative is the story of the difficult love of the poor Berda and the daughter of the shepherd Uzuk, who will be freed and made happy by the revolution.

The daughter of René, King of Provence, who has been blind since birth, is unaware of her misfortune thanks to her father's diligence. She is betrothed to Robert, Duke of Burgundy. Her father hopes to restore his daughter's sight before the wedding with the help of a Moorish doctor. Robert and his friend Godfrey of Vaudemont, Count of Isonde, Champagne, Clervaux, and Montargis arrive at the castle. Robert is in love with Matilda, Countess of Lorraine, and wants to ask King René to break his promise. Vodemons sees the sleeping Jolanta, falls in love with her, and asks the king for his daughter's hand. Upon learning that Robert loves another, the king agrees to the wedding. The doctor's efforts are successful, the girl regains her sight and, happy, gets married.

The Second World War is over. The post-war Germany is divided into several responsibility zones. Still many Russian people languish in camps located in the American zone. Though former allies are in no hurry to let them off to the motherland, and even try to enroll some of them. The American intelligence agency gets to know that they've got a daughter of one of the West Germany cities commandant, whose brother is a famous soviet rocket engineering designer. They plan a crafty operation on the discrimination of the Russian colonel and introduction of the niece into the uncles design office. The Russian Intelligence service is also aware of the Americans interest in the designers works. The special department colonel Lartsev is coming from Moscow to Germany to prepare a reciprocal operation.