The Silver Age. In Petersburg, the bohemian set gathers in the cabaret “The Walking Dog.” In Odessa, the cafeshantans are in full swing: along the streets stagger sailors, anarchists, and bindyuzhniks. And at the same time, a Russian ethnographic expedition sets off for far-off Dahomey, in West Africa, where—deep in the jungles—it encounters something grim, inexplicable, and truly hellish—something that brings death.
The travelers who manage to return from Africa, one after another, become victims of a murderer. Police sub-assistant Valentin Sablin and attorney Alexander Krasovsky take on the task of unraveling the chain of brutal crimes. They follow the bloody trail of a merciless monster, trying to reach the solution to what its nature is. Who is behind the killings—an awakened ancient deity of the African thickets, or a man-beast hiding behind its mask?..