Business lady Anna is about to celebrate her 40th birthday. Together with her husband Sergey, they own a small company and things are going well. But in the personal life of the spouses, not everything is all right. Anna feels that her husband has cooled off to her, and most likely he has a lover. Once in a beauty salon, a woman meets a young Natalia, who secretly tells her that she is crazy, in love with a married man with whom she has an affair. Ironically, this man is Sergei, Anna’s husband ....