Moscow. Shop car repair plant, workers at the machines, a meeting of Komsomol workers to strengthen labor discipline. Construction of the Leningrad hydroelectric power station, a temporary working town, a railway line. The trial in Stalingrad on Traktorstroy over the racists (American workers Louis and Brown), who beat the Negro Robinson, sentencing. Turkmen women with children at school. Crimean ASSR. Places of battles during the civil war in the Perekop area, pioneers inspect the places of battles, talk with participants in the war.