An epic and fast-paced tale of lycanthropy and female werewolf hunters, set in the ancient university town of Oxford. When an ancient werewolf killed her brother and attacked her boyfriend, Iris vowed revenge against the Beast. Now she is head of the Vix, a shadowy organization dedicated to killing such creatures. But Iris's boyfriend needs help. His body is fragmenting - the rules that govern his transformations into a wolf are changing. His only hope of keeping his deadly animal nature under control is the Silver Collar - an ancient artifact currently owned by the Vix.