Contract hand-to-hand combat trainer Stas Krupenin was killed in Izmailovsky Park. This case should have been dealt with by the homicide department of the Moscow Criminal Investigation Department, but it becomes a robbery (at that time a gang of robbers was operating in Izmailovo) and Stas’s parents are forced to contact the Gloria agency. At the same time, in parallel with the investigation into the murder of Krupenin, Turetsky and Pletnev are conducting a quiet case regarding the theft of a prototype of the drug “Cranberry”, stolen from the storage room of a laboratory created by Turetsky’s friend, Shumilov. And all this unfolds against the backdrop of family troubles and other passions of the Turkish couple.