It is 1920. After three years of the Russian Civil War, communist government is finally established in Odessa. Young Volodya Kozachenko, who dreams of being a detective like Sherlock Holmes, joins the newly forming Odessa Criminal Police.
| Actor | Role |
|---|---|
 Vladimir KolokoltsevVolodya Kozachenko | Volodya Kozachenko |
 Roman FilippovFedka Byk | Fedka Byk |
 Nikolai Volkov St.Professor Kozachenko | Professor Kozachenko |
 Vadim ZakharchenkoGorobchik | Gorobchik |
 Dmytro Milyutenkograndfather Taras | grandfather Taras |
| VViktor MizinenkoViktor Prokofievich Shestakov | Viktor Prokofievich Shestakov |
 Dmitri IvanovNot listed | Not listed |
 Kostiantyn KulchytskyiOnwer of wagon | Onwer of wagon |
 Olga LysenkoMarusya Tsymbalyuk | Marusya Tsymbalyuk |
| IIgor MaksimovNot listed | Not listed |
 Yurii TymoshenkoGrishchenko | Grishchenko |
 Vasiliy VekshinSergej Tsymbalyuk / Krasavchik | Sergej Tsymbalyuk / Krasavchik |