Film deals with Stakhanovite movement. Old miners try to sabotage young man's plan to renew methods of getting coal.
Anton Mikhailovich Kulagin
Stepan Kulagin
Pavel Lugovoj
Dunya Velichko
Vladimir Nikolaevich Sokolov
Miner Zaika / Dr. Starkovsky
Sliva
Sergo Ordzhonikidze
Commission member (uncredited)