Construction of the Sayano-Shushenskaya and Mainskaya hydroelectric power plants on the Yenisei River. Agrocity Shushenskoye; street, city square, village buildings; the interior of the village hut; Memorial Museum of V.I. Lenin, the building of the Shushensky state farm-technical school. College students work in the field. Shushenskaya bakery; finished product comes out of the oven - bread; milk bags move along the conveyor line. Steppe. Khakass Autonomous Region. Sheep are grazing. The National Dance Ensemble is dancing in the steppe. Abakan city: high-rise residential building, square, cinema. Workshop of the Abakan Carriage Works; automatic welding of container walls. Platforms with railway containers. Extraction of marble in the mining quarry of the Kibik-Kordonsky marble deposit. Grinding of marble slabs at the Sayan Marble Combine. City of Minusinsk, museum-library of local ethnographer Matyanov. Minusinsk Electric Machine Building Plant. The workers are adjusting the apparatus, working at the control panels. Shop of the Sayan aluminum plant: a melting furnace, aluminum is poured from a ladle, finished products. Village of power engineers "Cheryomushki"; children ride the carousel. The train moves along a section of the Abakan-Tayshet road, enters a tunnel.