Typography. Linotype works. Worker at the typesetting machine. Meeting of the plenum of the Communist Party in Spain. On the podium: D. Ibarruri, J. Diaz, S. Carillo and others. Speeches at the plenum of military delegates, a member of the Central Committee Carlos, A. Miche, J. Diaz. Republican army planes in the air. Barricades in the area of Karabanchel. The soldiers are sent to the front. Artillery plant in Sagunto. Soldiers of the international brigade at the sugar factory near Arganda. The building of the brewery. Fighters from the international brigade are driving up to the plant in cars. A visit by the soldiers of the plant. Soldiers talk with workers, drink beer. Playing tennis in Barcelona. Theater in Valencia. Spectators in the hall. Seeing the international brigades to the front.