Walruses Are Swimming(1981)

Original title: Плывут моржи

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...