Kaioh, the amphibious, bad-boy "mermaid" has taken to submissive Kanan like a fish to water. But when Kaioh's feud with his childhood rival, Haru, threatens to complicate things, Kanan might just get to see Mr. Mermaid's ugly side. All this conflict attracts the unwanted attention of Lord Amur, a self-centered monarch to whom the beautiful denizens of the deep are mere playthings. Clearly, this arrogant trickster knows that real sunken treasure does not come in the form of aquamarines or pearls, but in the form of flesh. Can Kaioh and Kanan overcome Amur's meddling to make it back to shore together? And just what part does that giant clam play in all this, anyway?!