Rita, a notary's assistant, lives in love with her husband. But no one except her husband and father knows that Rita has a congenital heart defect and could die at any moment. When Rita is once again admitted to hospital, her husband's mistress, who turns out to be expecting a child, visits her. Rita gets a divorce and undergoes a heart transplant. The donor is a young woman, Natasha. Natasha's husband Kirill signs a consent for his wife's heart transplant.
Rita begins to dream: two children - a boy and a girl who call her mother... Realizing that this is Natasha's heart speaking, Rita gets a job in her family as a tutor, becoming close to Kirill and his children. And at the same time she convinces her policeman father to help Kirill find out why Natasha really died...