Writer Agatha Sever is known for her action-packed novels based on real events. She becomes a witness to intricate crimes taking place on a quiet northern island. And not merely a witness—together with her assistant Marusya, Agatha conducts independent investigations and, willy-nilly, brings danger upon herself. Another chain of terrifying events begins with the murder of a man found on the island with numerous bite marks. Everything about the case suggests vampires starved for blood. But Agatha is an author of realistic prose. She is used to trusting common sense and logic, which once again lead her to dangerous discoveries.