Gabriel Braven now believes his destiny is with his beloved Mer Prince Casillus Nerion, but he cannot quite imagine a life under the waves and leaving his best friend Corey and Grandma G behind on land.Through their psychic bond, Casillus lets Gabriel experience the wonders of the Mer capital city of Emralis from the home of his ancestor Aemrys Liseas to the Mer palace. But even in the midst of all this love and beauty, Gabriel's nature as a Caller draws darkness to them.Cthulhu, the alien entity whose presence means destruction and madness for the human race, warns Gabriel that Johnson Tims will stop at nothing to expose the Mers' existence and something must be done about him.