Chased by the military police force, the partisans Boyka and Anton take refuge in a cave. A grenade explosion dislodges the rock, which seals off the passage.
War has come to a small Bulgarian town. The boy Mitko befriends a wounded partisan whom he hides in his attic. When the partisan goes into the forest, Mitko and his parents go with him. So the boy, having interrupted his childhood games, becomes a full-fledged member of the partisan detachment. One day, heroically defending his wounded comrades, Mitko dies in an unequal battle with the Nazis.
Five Bulgarian émigrés return to their country by submarine from the Soviet Union. They have to organize the antifascist resistance.
