Mine city. The building of the mine "Proletarian Dictatorship". Coal mining in the face. Meeting of miners dedicated to socialist competition. Coal sorting. Solemn meeting dedicated to the 13th anniversary of October. Presidium speakers. Presentation of the Challenging Red Banner to the forward brigade of miners. Collective applications of mine workers to join the CPSU (b). Production processes at the Sumensky Metallurgical Plant. The building of the Shakhty kitchen factory. Workers at lunchtime. Buffet in the dining room.