A young milkmaid Liza becomes an outcast of society in one of the Kuban collective farms. An honest and hardworking girl finds protection from the brave and sensitive party organizer Prokhor, who stood up for her.

Terenty leaves the collective farm and goes to the city to study to become an agronomist. Marina works hard and looks forward to her husband's return. When her husband returns home, he reproaches his wife for being uneducated, asks for a divorce and leaves for the city. Left with her daughter, Marina devotes herself entirely to her studies and work.