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.

Mityo Ganev is a leader of the armed bandits. The authorities accuse the Communists of his robberies. The detachment commander, Chalaka, and Mityo Ganev have a meeting but fail to reach an agreement. The police burn out Mityo's house and send his mother into internal exile. Chalaka cuts him off from his logistical support base. Mityo agrees to join the partisan detachment. Mityo and Velyo hold up the paymaster of the army garrison. When they take the money, Mityo wants to give it to the family of the exiles. Enraged, Velyo hands the detachment over to the Colonel. Mityo kills the traitor. The police and he army launch a major operation against the partisans. In a fierce battle, Chalaka leads the detachment out of encirclement while Mityo covers their retreat. A bullet hits him.