The film tells about the struggle of the Donbas miners in Ukrainian SSR with saboteurs.
| Actor | Role |
|---|---|
 Pyotr AleynikovVanya Kursky | Vanya Kursky |
 Ivan PelttserNot listed | Not listed |
 Ivan NovoseltsevNot listed | Not listed |
 Mark BernesNot listed | Not listed |
 Yuri LavrovNot listed | Not listed |
 Vera ShershnyovaNot listed | Not listed |
 Boris AndreyevNot listed | Not listed |
 Aleksandr ChistyakovDistrict committee secretary | District committee secretary |
 Vladimir UralskiyKirichenko | Kirichenko |
 Elizaveta LilinaNot listed | Not listed |