Ali is a mermaid on a mission. Her aunt wishes to permanently return to the sea so Ali needs to find the Guardian, lure him if she must, and exchange her protective aquamarines for the mermaid treasure he safeguards.

But oh, how things change when a sexy, blue-eyed Devlin spins those plans into a corkscrew dive Ali's not certain she wants to come out of.

Devlin is happy to honor his cousin's demand to give the "princess" whatever she requires. Her response when he pulls her into his arms convinces Dev the beauty needs a great deal. But how can he convince Ali otherwise, when she believes an inner lure is responsible for the incendiary attraction between them? There's really only one way. Seduce the siren.