Werewolves, in which the blood of the red-skinned Warrior Dogs flows. Vampires are the bearers of the sophisticated culture of the Deep South. They are the true aristocracy among the undead of the New World, and therefore are accustomed to look down on other “spawn of Darkness.” However, Mercy Thompson is from the tribe of people - coyotes are a different matter. She grew up in a pack of the leader of werewolves and is used to resolving the most complex conflicts between different clans of “night hunters.” But this time it will not be easy for her - after all, someone is brutally killing the “others”, one after another, and each of the peoples of the Night swears of his own innocence and blames someone else for the murders. Mercy, who begins the investigation, has only two clues: the mysterious criminal has absolutely incredible physical strength even for a non-human and is clearly afraid of “cold iron.”