The protagonist of the series "Cena lyubvi" is Elena, a university professor. She has been married for many years, raising her daughter Katya, and considers herself a successful person. However, feminine happiness has long been absent from her life: the passion with her husband has faded, and there are no signs of any positive changes on the horizon. The only thing keeping her from getting a divorce is their child. But even this moral barrier crumbles when a twenty-year-old student named Andrey enters the life of the forty-year-old professor and captivates her.