When Nina Klementyevna, a young scientist, created her laboratory, Zoya became her loyal and devoted assistant. Many years later, having raised three children, Zoya Dmitrievna, a laboratory assistant, meets San Sanych, a kind but weak-willed and drinking man. And the relationship with Nina Klimentievna is collapsing...
| Actor | Role |
|---|---|
 Lyusyena OvchinnikovaNot listed | Not listed |
 Andrey DudarenkoNot listed | Not listed |
 Lyudmila ArininaNot listed | Not listed |
 Dmitriy KharatyanNot listed | Not listed |
| IIzabella ChirinaNot listed | Not listed |
 Aleksandra YakovlevaNot listed | Not listed |
| NNina SkomorokhovaNot listed | Not listed |
 Gelena IvlievaNot listed | Not listed |
 Vladimir DyatlovNot listed | Not listed |
 Valentin BukinNot listed | Not listed |
| VVladimir MikhelsonNot listed | Not listed |
 Svetlana KireevaNot listed | Not listed |
 Olesya IvanovaNot listed | Not listed |
 Lyudmila BezuglayaNot listed | Not listed |
| LLyudmila MolokovaNot listed | Not listed |
| EElena BelyaevaNot listed | Not listed |
| AAleksandr Bakharevskyнаучный сотрудник | научный сотрудник |