The main heroine of the Russian TV series "Harmonies of Love," Antonina, teaches music to children and takes care of her sick husband. Anatoly has had a heart attack and requires constant care. But one day, Tonya learns that her music school is closing down, and finding a new job in her profession in a small town proves to be impossible. So, she goes to the capital city to give lessons to the child of her old acquaintance. However, in Moscow, an unexpectedly forbidden feeling awaits her.