It all started with a curse. When magical mermaid Sereia saves her little sister and overshadows her brother and the sea's rightful heir, Triton, the position of next ruler of the sea is in question. Determined to keep his throne, Triton curses Sereia, transforming her into a human and stripping her of magic. Banishing her from their underwater kingdom, he gives her a final warning: if you should ever return, you will become a monster. Left for dead,...

Princess Mera is teenage royalty and heir to the throne of Xebel, a colony ruled by the other no-so-lost land under the sea, Atlantis. Her father, his court, and the entire kingdom are expecting her to marry and introduce a new king. But Mera is destined to wear a different crown.... When the Xebellian military plots to overthrow Atlantis and break free of its oppressive regime, Mera seizes the opportunity to take control of her own destiny by assassinating...

Now married to Ryann and happy in Atlantis, Finch is preoccupied with defending the throne from traitors, while Nash simply fights for survival for himself and for Huntress.