"Vampires are at work in St. Petersburg!.." These terrifying rumors are spreading through the city media, and Major Karpukhin is already at his wits’ end trying to find the killer of the daughter of a prominent politician who is running for governor. Judging by all signs, Regina became a victim of those notorious vampires: there are bite marks on her neck, and blood has been drained from her… At the same time, the Medical Investigations Department—through its employee Agniya—is trying to determine how infected blood was transfused to patient Zhurava, as a result of which the woman developed hepatitis C. And then something unexpected happens that derails the course of the investigation. Agniya’s friend Denis, after meeting the gothic princess Elina, finds under his bed… a plate with blood—apparently his own!—and a terrible voodoo doll.