In the ruins of the former brick factory of the merchant Melnikov, residents of the city of Volzhansk increasingly see at night a monster with the body of a man and the head of a bull. According to legend, in the underground corridors of the plant there is a deformed child imprisoned, whom the merchant’s wife gave birth to from the devil himself. Things take a tragic turn when several young rockers who decide to hunt a mysterious creature die. On the phone of one of the young people who fell and broke on the broken bricks, the shadow of this half-beast, half-man is visible. Yulia Pchyolkina, Mishka Somov and Pasha Kiselev are investigating a mysterious case. They learn that in these Volga regions there was an ancient cult of a pagan god, and its followers annually organize an orgy in honor of this deity. Yulia and her friends make their way into the basements of the plant and see in a stone tunnel a monster with an athletic body, a horned bull's head, and bloodshot eyes...