One of the main lines of "Gardener" is a homicidal maniac, the prototype of which was the infamous " Bitsevsky maniac. In the Federal Service, the situation is not simple : high management in the Ministry decided to leave only one structure — a specialized division of the Ministry of internal Affairs or an experimental FES. The FES is conducting an operation to catch the killer. And this time, the very existence of the service depends on the results of the team's work.