If earlier Zinaida Krestovskaya was convinced that the Lugaru - a cross between a man and a wolf - was something from the realm of mythology, then the events happening to her force her to completely change her opinion. Working in the morgue, since she was not accepted anywhere else, Zinaida dissects very strange corpses - the death of the unfortunates occurred because someone bit through their carotid artery. After the analysis, it becomes clear that there are traces of human teeth on their necks...