Evgeniia Lisitsyna’s life resembles a fairy-tale – she is young, beautiful, and has a wonderful career and a man of her dream who proposes to her and supports the offer with a big diamond. The idyll is ruined by a door ring. At the doorway, there is a little boy saying he is Evgeniia’s son and he is death-sick. The little Lev needs an urgent surgery which can be performed only by a genius cardio-surgeon Vadim Safronov. However, Vadim, who survived a personal tragedy, does not operate on children any more.