Three soldiers make their way into a city occupied by the Nazis.

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.

A black child rescued from by Russian sailors, whom they name Maksimka, having overcome his fear of white people, turns out to be an unusually smart and kind little boy. The rude drunken sailor Ivan Luchkin was especially attached to the boy. Once it was Maksimka who managed to save Luchkin from foreign recruiters of labor. For resourcefulness and courage, the young hero is enlisted in the team of the corvette and becomes the cabin boy of the Russian fleet.