Young girl Caroline was sold by her grandmother to human traffickers. While fleeing through the woods, she encountered Adrian—the Alpha leader of the werewolf clan. Adrian brought her back to his villa, and without realizing it, Caroline stepped into a hidden werewolf world that exists beneath modern society. As they spent time together, Caroline gradually grew from insecure to confident, and the years-long rift between Adrian and his best friend Finn began to heal because of her. Feelings blossomed between them, but Cedar—the leader of a rival wolf pack—sought to seize the power of the ancient Wolf King. He manipulated Adrian's younger brother Asher, drove a wedge between Finn and Adrian, and even kidnapped Caroline. In the final battle, a third sealing seal appeared on Caroline—the mark of the Wolf King's fated one. She was never an ordinary human. She had always belonged to this world.