When a college party ends with a gruesome discovery and werewolves start showing up in broad daylight, Sam Lehrman, a local dog trainer, is forced into action. Throughout this journey, Sam finds himself not only facing the demons of his past but also fearing for the future of canid-kind. Not knowing who his true allies are, Sam sets out to secure the fate of the only item that might be able to save them, The Book of Wolves.