Type of construction and finished structures of the Volga-Don canal, Tsimlyansk reservoir, towing of a motor ship by water. Work in the shop of the Leningrad plant "Krasnaya Zarya", political studies in the circle of Marxism-Leninism at the plant, students of the circle on an excursion to Razliv. Engineers are working in the laboratory of the Leningrad Institute of High Frequency Currents, performing experiments on heating the bar. Participants of children's amateur performances are preparing for a performance on the stage of the Palace of Culture named after AM Gorky, play a fragment from the play (synchronously).