An enterprising young man who practices medicine, striving to win the affection of his beloved, vows to cure her mother of a serious illness. To truly learn the secrets of medicine, he has to pretend to be deaf and mute and hire himself out as an assistant to the best doctor. Will the hero be able to keep his promise?
| Actor | Role |
|---|---|
 Oleg KazancheevRadomir - physician's apprentice | Radomir - physician's apprentice |
 Oleg GolubitskyVazili - king's physician | Vazili - king's physician |
 Natalya VavilovaTodorka - dancer girl | Todorka - dancer girl |
 Ariadna ShengelaiaMaria - Todorka's mother | Maria - Todorka's mother |
 Mikhail GluzskiyCosta - king's educator | Costa - king's educator |
 Grigori ManoukovKing | King |
 Viktor IlichyovGrozdan - foolish youth | Grozdan - foolish youth |
 Yuri ChekulayevKavas | Kavas |
 Liliya Gritsenkolady - patient's mother | lady - patient's mother |
 Ion MarinescuNot listed | Not listed |
 Svetlana Orlovastate-lady | state-lady |
 Aleksandr AnyutenkovNot listed | Not listed |
 Vassili BezdushnõiNot listed | Not listed |
| VV. ZhivovNot listed | Not listed |
 Valery Lysenkovexecutioner | executioner |
 Aleksandr Saykosick - cured Vazili | sick - cured Vazili |
 Béla TarrNot listed | Not listed |