The film is dedicated to the working dynasties of the Kaluga Machine-Building Plant Konstantinov, Evstigneev, Yevtushenko, Karpov. The city of Kaluga. Representatives of working-class dynasties at work, with their families, with relatives and friends, give interviews (synchronously). Photos from different years. Streets of the city, including Konstantinovykh street, a memorial plaque on one of the houses. Buildings, the territory of the machine-building plant, production processes in the shops. The workers go to the factory. Literary evening in the club of the machine-building plant. Chronicle footage dedicated to the construction of Turksib, a camel sniffing rails, a steam locomotive moves along the railroad in the taiga, the construction of the city of Komsomolsk-on-Amur, the Fergana Canal, Dneproges, Magnitogorsk Iron and Steel Works. House-Museum of K.E. Tsiolkovsky in Kaluga. Monuments to Tsiolkovsky and Gagarin, pilot Karpov.