The plot tells about the Rodionovs dynasty of steelworkers working at the Taganrog Metallurgical Plant: production processes in the open-hearth shop of the plant. The plot tells about the dynasty of rivermen Ivanovs: the movement of ships on the river, the register inspector V. D. Ivanov, the captain of the ship "Meteor" P. Ivanov, the mechanic of the ship "Anatoly Vaneev" S. Ivanov at work. The plot tells about the Surkov dynasty of pilots. Pilots: A. Surkov, V. Surkov, M. Surkov during the flight.