Soviet intelligence officer, Lieutenant Goncharenko, under the name of Baron Heinrich von Goldering is thrown into the deep German homeland on a mission to find out the location of the secret underground plant that produces new types of weapons.
| Actor | Role |
|---|---|
 Mikhail KozakovHauptmann Saugel | Hauptmann Saugel |
 Vadim MedvedevHeinrich von Goldering / Lieutenant Goncharenko | Heinrich von Goldering / Lieutenant Goncharenko |
 Zinaida KirienkoMonika | Monika |
 Vsevolod AksyonovWillie Bertgold | Willie Bertgold |
 Boris DmokhovskyMajor Kubis | Major Kubis |
 Sergey PetrovGartner | Gartner |
| AAleksandr GumburgSchvalbet, restaurant owner | Schvalbet, restaurant owner |
| VVladimir BibikovNot listed | Not listed |