A film about the economic cooperation between the USSR and Czechoslovakia. Moscow city. Kremlin. People at the Tomb of the Unknown Soldier. N. Tikhonov and Strougal signed the Soviet-Czechoslovak communiqué. City of Prague. People in the streets. Shop salon. Construction of a nuclear power plant in Czechoslovakia with the help of Soviet specialists. Engine room. Remote Control. Production of nuclear equipment at the Skoda plant in Pilsen. Scenery. Pine forest. A lumberjack is working. Construction of a pulp and paper mill in Paskov. Installation of Soviet equipment. Paper production. Typography. Issue of newspapers. Bookstore showcase. Prague Metro. People get out of the cars, go up the escalator. Construction of a new station.