Thea Quinn doesn't know what's wrong with her. She only knows that her abilities have ruined her life since childhood. After spending terrible years in the hands of a megalomaniac, Thea escaped and has been on the run ever since. For Conall McLennan, the most important thing is the leadership and protection of the pack. He is the Alpha, head of Clan MacLennan, the last pack of werewolves in Scotland. Therefore, it is emotional torture for him to watch his sister slowly die from lycanthropy. When Conall is approached by a businessman with an offer to provide a cure for his sister in exchange for using Conall's rare tracking ability, he falsifies the deal. Conall must find and return the key to the cure: the dangerous assassin, Thea Quinn. Thea's attempts to escape from the brutal werewolf are thwarted not only by the Alpha, but also by external dangers. To survive, Thea and Conall will have to rely on each other to uncover the truth, fueling the burning passion between them that they both resist. Fighting with and among themselves, Conall and Thea travel to Scotland, where they will have to face a heartbreaking choice between love and betrayal.