Continuing the investigation into the poisoning of Catherine II and looking for the potion, Rozintsev and his friend Oprichnikov encounter people with incredible strength, lightning-fast reactions and absolutely indifferent to human lives. One of them said that they are the result of Atlantean experiments and come to the human world to have fun. This time they are organizing a vampire competition. The winner is the one who kills the lady of the highest position. But Rozintsev admits that this is just an organization of crazy people. At the same time, he discovers that he has some features that go beyond the capabilities of ordinary people, and rumors are spreading throughout St. Petersburg that he is a werewolf.