Fia's life crumbles when her fated mate rejects her on her half-sister's wedding day—and worse, Hazel has eloped with him. As the Alpha groom threatens devastating war against her pack and her stepmother desperately pleads for a solution, Fia makes an impulsive decision: she'll marry him instead. But this isn't salvation—it's a snare. With her family's betrayal cemented and accusations of stealing Hazel's happiness shadowing her every move, Fia becomes Alpha Cian's perfect instrument of vengeance. He doesn't want her as a mate; he wants her broken, suffering, and humiliated until her final breath. Torment and cruelty are his sacred promises. Yet fate has other plans. What neither anticipated is how hatred can transform, ignite, and metamorphose into something infinitely more potent. Caught between deception, abandonment, and a connection they desperately resist, Fia and Cian must confront an unavoidable truth: the boundary separating hate from love was always meant to be crossed.