The East Coast wolf packs face an unusual "disappearance" phenomenon—people vanish without a trace after entering the forest. Ancient journals in family libraries document these events, initially affecting small animals or patches of landscape before extending to humans. Disappearances are becoming more frequent, changing from once in decades to once every few months. Evidence suggests these disappearances relate to some "mirror world" or "parallel universe," with those who vanish having "dual faces". Blackthorn and Silverwood are the two most powerful werewolf families; their alliance creates an unbeatable force on the East Coast. The Blackthorn family hosts ancient witches who may possess knowledge explaining these disappearances.