Village "Komintern" (Donbass). Mine OGPU. Students of the Moscow Mining Institute get acquainted with the structure of a coal mine, study production processes in mines during practice. Various moments showing the irresponsible attitude of the miners to their work: a drunken mine worker is walking, workers are playing cards, resting, a broken mine cart in the mine, a board with lists of absentees and records of technical problems. Shock brigade miners are working on coal mining. Posters urging Donbass miners to work better.