The small town of Bellamy Bay has its share of skeletons in its closet, but it isn't used to bodies turning up in the local history museum. After all, this Coastal North Carolina town is much like any other...except, of course, for the mermaids.

Helping to run the family business, an herbal apothecary, while keeping her supernatural secret hidden is no easy feat for water witch Aleksandra Daniels. But somehow she's still found time to help her friend Celeste, who has her own Caribbean mermaid heritage, plan the annual Mermaid Festival. As fun-seekers throng the beaches, Alex gets to know and is intrigued by renowned artist Neve Ryland, who's in town to decorate the local park with a mermaid-themed mural. Celeste, however, is less enamored with the artist, as Neve has been spending entirely too much one-on-one time with her boyfriend, Jasper, the director of Bellamy Bay's history museum. Then, a reception for Neve ends abruptly when the artist is found dead in his office.

The police investigation nets Celeste who asks Alex to find the true culprit. With the help of her magically inclined aunt and cousins, Alex dives in to clear her friend's name. But there was more to Neve Ryland than met the eye, and Alex fears she may be in way too deep. Will she catch the crook or be next on the hook?