Captain Emelin, nicknamed Emelya, captains Vasin and Dolbunov are investigating the most complicated crimes, and forensic expert Masha Likhacheva helps them with this. Emelya's reputation is so-so; the head of the department, Colonel Khitruk, does not like him for his independent character, but is forced to put up with him because Emelya has a good detection rate.
