Moscow city. Streets, city squares. Arrival of delegations to Moscow for the celebration of May 1st. The ceremonial meeting of the Moscow Regional Executive Committee at the Bolshoi Theater of the USSR. Bureau of the meeting, speakers. Demonstration of workers, a military parade on Red Square. On the podium: V. V. Kuibyshev, A. I. Mikoyan, V. M. Molotov, L. M. Kaganovich, I. V. Stalin, G. K. Ordzhonikidze, S. M. Budyonny. KE Voroshilov takes the parade. Transfer by Osoaviakhim (Society for Assistance to Defense and Aviation-Chemical Construction) to the Moscow Military District of aircraft at the Moscow airfield. The transfer of armored vehicles to representatives of the Red Army, built with funds raised by the workers. Sports festival at the Dynamo stadium. Festivities on the Sparrow Hills.