"After leaving Siren to recover from his wounds in the shark castle, Kappa heads out into the big wide ocean once more, but minutes into his newfound freedom another prophecy intervenes, pulling him toward a giant demigod crab scuttling along the ocean floor. As Kappa tries to understand why he is drawn to this crab, he encounters three magic-wielding octopi with tragic pasts and uncovers more about his greater purpose as the Beacon. When Siren finally leaves the shark castle a month later, Kappa is long gone, and alone in the greater ocean--about which he has only ever heard--Siren quickly realizes he is unequipped to fend for himself. After his supplies are stolen by thieves, he finds himself, by luck, in the company of a young fish and his mother and joins them on their travels; as they teach him to fight and survive in the wild, Siren begins searching for a cure to his curse."--Back cover.