The hunt is on! When sixteen-year-old Bree Sunderland went with her scientist dad to Ireland, she thought it would be a vacation to study bog bodies. She never expected to fall in love with a mysterious young Irishman and certainly never expected to become the kind of monster her dad said only existed in nightmares. Dr. Sunderland discovers that lycanthropy was not a supernatural curse but rather a genetic mutation. When they return home, her dad continues his research, but the military wants to turn that research into a bio weapons program and rogue soldiers want to steal the research to turn themselves into unstoppable killing machines. Bree's boyfriend Liam surprises her with a visit to the United States, but there are darker surprises in store for both of them. As evil forces hunt those she loves, Bree must become an even more dangerous hunter to save them all.