The plot is based on the story of the complex relationship between Peter Schmidt and Zinaida Rizberg, with whom he corresponded after a chance meeting on the train.
| Actor | Role |
|---|---|
 Yuriy KayurovLenin | Lenin |
| AAnatoliy FalkovichDzerzhinskiy | Dzerzhinskiy |
 Aleksandr ParraShmidt | Shmidt |
 Svetlana KorkoshkoZinaida Rizberg | Zinaida Rizberg |
 Yevgeny MatveyevNot listed | Not listed |
 Arkadii HashynskyiNot listed | Not listed |
 Antonina MaksimovaNot listed | Not listed |
 Gurgen TonuntsNot listed | Not listed |
 Nikolay GrabbeNot listed | Not listed |
 Yuri LavrovNot listed | Not listed |
 Gennadi YudinNot listed | Not listed |
 Pavel VinnikNot listed | Not listed |
| IIvan BondarNot listed | Not listed |
 Viktor MalyarevychNot listed | Not listed |
| SSvetlana NagornayaNot listed | Not listed |
 Marina YurasovaNot listed | Not listed |
| VValery KvitkaSailor | Sailor |