A cardiac surgeon accidentally witnesses a murder by her criminal boss. To survive, she marries his nephew, a mobster, aiming to reform him through her compassion and change his cruel ways.

The series is based on the classic story of Beauty and the Beast. It is a story of constructive love. The protagonist, a well-known 30-year-old cardiac surgeon Nastya, tries to help her beloved Maksym, who for many years has been part of criminal circles, out of the hell he lives in. The woman does not suspect that the owner of the clinic where she works is indeed a criminal. Apart from running the hospital and helping people, he has an unlawful business that deals in illegal medicines and drugs. Once, Nastya by accident witnesses a murder his gang commits. It is now clear she is doomed: the boss orders his thugs to kill her. However, the boss' nephew, who is also his chief bodyguard, disobeys the order. To save Nastya's life he proposes her to marry him. Thus a decent woman becomes a member of a big criminal family and starts living with all of them in their huge mansion, which hides a lot of secrets. But the hardest role Nastya has to play is to be Maksym's wife. They are complete antipodes: Nastya is a saint, while Maksym is a sinner, she is good, while he is evil, she is the light, while he is the darkness. Nevertheless, Nastya can see Maksym's true self through the shell of indifference and cruelty that covers him. She can awoke his heart, clear his soul and change his life.