Ever since her mother’s death, Kela feels every bit as broken as the shards of glass, known as “mermaid’s tears,” that sparkle on the Caribbean beaches of St. Rita. So when Kela and her friend Lissy stumble across an ancient-looking comb in a coral cave, with all she’s already lost, Kela can’t help but bring home her very own found treasure. 

Far away, deep in the cold ocean, the mermaid Ophidia can feel that her comb has been taken. And despite her hatred of all humans, her magic requires that she make a bargain: the comb in exchange for a wish.

But what Kela wants most is for her mother to be alive. And a wish that big will exact an even bigger price…