Arden Bleu has always known that her stepsister, Jade, was destined for great things. In a world where beauty follows magic, she has no doubt that their upcoming Awakening ceremony will reveal that gorgeous, kind, compelling Jade is far more than a mere mortal. But when Jade is kidnapped by a mysterious sect of mer on the eve of the newly-returned king's ball, Arden will do anything to save her sister. Even face down the man she's always dreaded meeting because of the power he holds over her family, the man to whom her father swore loyalty long before she was born. The Sea King.

Seidon, the Sea King of Daryatla, has grown only more powerful as the centuries have gone by, but lifetime after lifetime have failed to give him what he most yearns for: a family. He knows that it will take a woman of extraordinary power to match him enough to create a child, and no such woman seems to exist . . . until he feels her magic calling to his one day in the water. And when Arden Bleu, daughter of his most trusted official, arrives to tell him about her missing stepsister, he knows this Jade, with a new magic so coveted that the mer would risk war with his kingdom to steal her away, may be the one he's waited centuries for. But how can he and the determined Arden ever hope to find one young woman trapped beneath the waves?