When Coast Guard rescue swimmer Kaleb Theldon sees what he's sure is a mermaid pulling his partner into the murky depths of the Bering Sea, they call it PTSD. In order to save his career, Kaleb agrees to a week at an island spa off the coast of Maine. But the spa is nothing like he expected, and he isn't prepared for the sexy siren that crosses his path. But will her passion be more than one mere human can take? Serena has a problem, and after four previous visits to the Wiccan Haus, she'd expected things to get easier. But on the mermaid’s fifth visit, Kaleb walks in and everything in her life becomes complicated. Never has she wanted to mate with a human man before. But can she love a man who has a chip on his shoulder a league long when it comes to mermaids? Can she deal with her own issues all while keeping her true self secret from the man she loves? And will loving him prove deadly? This time, the staff have more than healing on their agenda. Can the siblings, Myron, and Rekkus prove to these two lovers that things aren't always how they appear on the surface? Or will Kaleb's demise be found in his Siren's Serenade? Welcome back to the Wiccan Haus.