Renowned scientist Dronov works in Novosibirsk on the creation of ultra-modern engine. He has a bad heart, he was afraid not to have time to finish the job, and test engine at a factory in Moscow, unfortunately, is not the first time passes unsuccessfully. Dronov abandons the rest of the work, even the leadership of the Institute entrusts to his disciple Morozov.
| Actor | Role |
|---|---|
 Nikolai Cherkasovscientist Fyodor Dronov | scientist Fyodor Dronov |
 Sofiya PilyavskayaNatalya Dmitrievna, Dronov's wife | Natalya Dmitrievna, Dronov's wife |
 Andrei Popovfather Serafim | father Serafim |
 Elina BystritskayaKsenia Rumyantseva | Ksenia Rumyantseva |
 Igor OzerovAlexei Vyazmin | Alexei Vyazmin |
 Igor GorbachyovVictor Morozov | Victor Morozov |
 Galina AnisimovaAsya Davidovna | Asya Davidovna |
 Yakov MalyutinMikhail Morgunov | Mikhail Morgunov |
 Vera KuznetsovaAnna Pavlovna, Vyazmin's mother | Anna Pavlovna, Vyazmin's mother |
 Efim KopelyanFilimonov | Filimonov |
 Boris RyzhukhinSizov | Sizov |
 Pavel PankovTroshkin | Troshkin |
 Vladimir MaksimovNot listed | Not listed |