Two packs. Twenty years of war. One arranged mating neither of them wanted. Isla Thorne is bound to the son of the pack that killed her brother. Bastian Ravencross is bound to the daughter of the pack he blames for his father's death. They hate each other enough to kill. On their first night alone together, one of them almost does. Then, just as that hatred starts turning into something else, someone is determined to ruin the growing closeness, and Isla wakes up not remembering why she ever stopped hating him at all.