The stationmaster of a railway station situated in the steppes of Kazakhstan discovers a rubber-bearing plant. Soon, an expeditionary team arrives, led by Professor Shakhron, who will persistently argue—by hook or by crook—that there are no rubber-bearing plants in these steppes, all the while plotting a trip abroad. In ultimately exposing the professor, the team forces him to admit to concealing the results of their work.
| Actor | Role |
|---|---|
 Vladimir GardinProfessor Shakhrov | Professor Shakhrov |
 Nikolay KutuzovKuznetsov | Kuznetsov |
| MM. TulupovProfessor Yaroshevskiy | Professor Yaroshevskiy |
| KKhakim DavletbekovKhakim | Khakim |
 Yevgeniya PyryalovaZhenya Maltseva | Zhenya Maltseva |
 Boris AzarovZaretskiy | Zaretskiy |
 Eliana DuginaYoung Kazakh girl | Young Kazakh girl |
| KKheyhana TastakhovaYoung kazakh woman | Young kazakh woman |
| SSergey GolubevTelegraph operator | Telegraph operator |
| VViktor ZakharovGuryev, student (uncredited) | Guryev, student (uncredited) |
 Nikolai MichurinFactory worker (uncredited) | Factory worker (uncredited) |
 Vladimir RomashkovScientist (uncredited) | Scientist (uncredited) |
| VVladimir StukachenkoFactory worker (uncredited) | Factory worker (uncredited) |
 Vladimir ChoburKomsomol member (uncredited) | Komsomol member (uncredited) |