A humble scientist from Padua proves that the Earth revolves and that it is not the center of the universe.

A lawyer must decide whether to help a young man.

Bulgaria. 13th century. The people, driven to utter despair, rise in arms. They elect Ivaylo - a poor peasant but gifted military commander - as their leader. Ivaylo's army overruns the Tatar invaders and the royal troops. In a decisive battle with the royal army, Ivaylo defeats and slays King Konstantin Asen. To prevent a betrayal on the feudal nobles, who intend to open the gates of the royal capital to Byzantine army, Ivaylo sacrifices his personal happiness, abandons his sweetheart and agrees to marry the widowed queen.

This is a typical story from the 'cold war' era. A group of kids play on a quiet street in Sofia. From a nearby window falls a key. The helpful youngsters quickly return it to the owner, but in the haste switch the keys. The unintentional error disentangles a whole spy story. The young detectives doubt the good intentions of the man they tried to help. It turns out that the key is from a secret apartment where saboteurs are hiding. The secret network is exposed to the authorities and the kids feel like heroes.

Strahil is a leader of a rebel band. The Turkish governor abducts beautiful girl Ivana for his harem. The outlaws hold the governor's child to ransom. The governor promises to Strahil neither to attack the peasants, nor to persecute them if he settles down to a peaceful life. Together with Ivana Strahil goes back to his father house... One day a group of people, driven by Turkish soldiers on their way to do forced labor, passes by Strahil house. Women and children wail. Strahil rushes at a soldier and kills him. There is an exchange of fire: Ivana is helping him. A large number of mounted troops surround Strahil's house. His band hurries to the village. Ivana hides in the cellar and fires. She hits the Turkish governor. The rebels rescue Ivana. The governor rises in a last effort and fires at Ivana. Dying Ivana manages to tell Strahil that she wants him to bury her in their favorite glade and return to the band. Strahil raises his hand to take an oath over Ivana's dead body.

Dr Ganevski leaves his wife Maria and his grown-up children Rositza and Chavdar for Dr Troyanovska, who has been widowed by the war. Her son, Angel, a school dropout, is in love with Rositza. Rositza renounces her father. Up to a point, Chavdar can understand Ganevski's decision. Hoping to live in affluence, the boy moves in with his father's new family. Dr Ganevski cannot bring himself to visit his daughter who is ill with the pneumonia. On his birthday, which he celebrates at his father's, Chavdar feels terribly lonely and leaves him.

Members of a partisan underground unit struggle during the anti-fascist Bulgarian Resistance of World War II.