“Vampires are at work in St. Petersburg!..” These terrible rumors are spread by the city media, and Major Karpukhin is simply knocked off his feet, trying to find the killer of the daughter of a famous politician who is vying for the post of governor. By all indications, Regina became a victim of these notorious vampires: there are bite marks on her neck, blood has been pumped out of her body... At the same time, the OMR - Medical Investigation Department - represented by its employee Agnia, is trying to find out how the patient Zhurova was transfused with infected blood, As a result, the woman fell ill with hepatitis C? And then something happens that was not foreseen by the course of the investigation. A friend of Agnia's son, Denis, after meeting the Gothic princess Ellina, finds under his bed... a plate of blood - apparently his own! – and a scary voodoo doll...