Jocelyn washes up on the shore of eighteenth century Ireland, alone, naked, and missing all of her memories. Taken in by a lonely old woman full of plots and schemes for the lovely yet enigmatic creature, Jocelyn knows only one thing. She longs for the sea with every ounce of her being. Yet it tried to kill her. Aidan Boyd loves two things. His ship and the sea. When Jocelyn is thrust upon his vessel in the midst of his superstitious crew, he finds himself intoxicated by her—willing to give up everything for her. He soon finds he cannot live without her. But something holds Jocelyn back. The whisper of another's love. The embrace of water. Does she belong to this world? Or could Jocelyn possibly be from the sea?

Jocelyn plunges into the ocean near Calcutta, India, thrown overboard by a man claiming it’s the only way to save her life. As she sinks, the transformation begins, and the ocean welcomes her back into its embrace. Aidan Boyd thought the only way to save Jocelyn was to give her back to the ocean, but now he’s not so sure. Aidan doesn’t believe in mermaids, but he can’t explain the way she changed. Will he see Jocelyn again? Or has he condemned her to a watery grave? Jocelyn drifts in a world she’d forgotten only to find she’s hunted by a deadly force from the ancient city of Thessa, the reason she was hidden in the world above. But she cannot get Aidan out of her head. Was what they shared real? Or was it a fantasy brought on by her unconscious need to seduce a human? Both Aidan and Jocelyn begin a desperate and dangerous journey to discover the truth... and hopefully each other. But will their love be enough?