St. Petersburg. Winter of 1917, the eve of the February Revolution. The maid finds in the room the corpse of the murdered tenant. In his pocket, a hotel account was found in the name of Karl Fischer, a well-known banker. An investigation is beginning. In the list of suspects - an agent of the secret police...

Dr. Fiedler, in a secret underground laboratory located in the reserve, is working on experiments to create bestial creatures endowed with human intelligence. It would seem that contact with the beasts on an equal footing took place, but devoid of human morality and compassion, beast-like creatures rebelled against their creators. The journalist Battley, who learns about the monstrous rumors from the reserve, decides to conduct his own investigation and goes to the wilderness, where he encounters the products of Fiedler's terrible experiences.

Olga Nikolayevna kills her little son Kolya and then herself. Andrey, the most laid-back and friendly cop in Russia, gets on the case.