Polish schoolboy Janek, and Russian girl Tanya are traveling by a plane which ended up in the hands of a gang of drug dealers headed by ex Nazi criminal Henrich Scharf.

Boev, an enthusiastic form master, is trying hard to establish rapport with his final-year students. His frankness, buoyancy and good nature soon make him a universal favorite. The only one who does not approve of him is headmaster who loves his job, but is not aware of how dated his own views are and cannot understand the young teacher. Apart from this, Boev comes in into particularly sharp conflict with his colleague and childhood chum Kiril who is consumed by jealousy and the ambition to get promoted quickly.

A promising but hot-headed young. boxer studies with a kind, knowing manager, grooming him for the Olympics.

During World War II, a plane transfers Bulgarian antifascists from the USSR to Bulgaria. They jump with parachutes. The eighth paratrooper heads a guerilla group. In the group, there are doubts about the existence of a traitor. Initially, an innocent person is accused, but later the real traitor is caught and killed. Still, the most dangerous enemies of the guerillas are the colonel and the troops stationed in the nearby village. The battle between them and the guerillas is won by the latter who continue to fight for their cause.