Betrayed and killed by the man she believed in, Luna returns to the last hours of her union with Keal, the underwater heir who once gave his life for her. Determined not to abandon him again, she fights to protect their fragile bond. Yet Owen, her merciless former lover, is hunting Keal's throne and will destroy anyone in his path. With danger rising and an enigmatic power linking their lives, Luna must defy destiny before love demands another devastating price.