Captain Emelin, nicknamed Emelya, Captain Vasin and Dolbunov are investigating the most complicated crimes, and criminologist Masha Likhacheva helps them in this. Emelya's reputation is so-so, the head of the department, Colonel Khitruk, dislikes him for his independent character, but has to put up with him because Emelya has a good disclosure.
Antonina Milyukova is a beautiful and bright young woman, born in the aristocracy of 19th century Russia. She could have anything she'd want, and yet her only obsession is to marry Pyotr Tchaikovsky, with whom she falls in love from the very moment she hears his music. The composer finally accepts this union, but after blaming her for his misfortunes and breakdowns, his attempts to get rid of his wife are brutal. Consumed by her feelings for him, Antonina decides to endure and do whatever it takes to stay with him. Humiliated, disgraced and discarded, she is slowly driven to madness.