S. Babanov

The film tells about the struggle of the Donbas miners in Ukrainian SSR with saboteurs.

Aviation school. Future officers of the jet squadron are engaged in practical studies. When performing a training assignment, cadet Korenyuk violates flight discipline. The instructor pilot, considering Korenyuk to be a talented cadet, forgives him for this offense. When, during another training flight, Korenyuk dives onto a fishing vessel, cadet Bukreev, who is in the cockpit, takes the blame. Bukreyev is arrested for ten days...

About the life and heroic death of the old Bolshevik-Lugansk resident, participant in the civil war, Aleksandr Yakovlevich Parkhomenko. In 1918, capturing Ukraine, the German occupiers sought to use the Haidamaks, the White Guards and the Greens in their struggle. By order of Voroshilov, Aleksandr Parkhomenko from Lugansk arrives in Tsaritsyn. At the same time, the Germans launched an active offensive. The "red" battalions are poorly armed, however, Parkhomenko manages to raise them to the attack and put the enemy to flight.

Terenty leaves the collective farm and goes to the city to study to become an agronomist. Marina works hard and looks forward to her husband's return. When her husband returns home, he reproaches his wife for being uneducated, asks for a divorce and leaves for the city. Left with her daughter, Marina devotes herself entirely to her studies and work.

A talented craftsman Andrei Panchenko has been appointed head of a large mine. He is full of hope and happy, because next to him is his beloved, charming and reliable Tamara. But not everything goes well for him at work, and a chance meeting with his childhood friend, the lively and cocky Nelka, completely turned his head. The young guy's warm heart is torn between love and duty, and soon Andrei finds himself at a serious crossroads in life...

The end of the 1920s. Lumbermen of small American village begin a strike. The strike committee included communists, the Smith brothers and the black lumberjack Murray. The fascist Dan dismisses rumors about a affair between Murray and a white girl, Gladys, the sister of the Smith brothers…