Enter Elly Moss, The quirky 16-year old with hopes that something special will happen when she finds herself cooped up in a car on the way from her comfy New York high-rise to the beach manor in Cape Cod. While shopping at a mysterious book store and stumbling over a book that 'calls to her', she finds a mystical spell that could make her vacation a little more sweeter. Soon enough, Elly is singing under the mooon, growing scales and even finding herself a handsome merman himself. But when her hometown love is found missing, she has no choice but to risk her legs for his life.

Vanessa was pretty much a regular girl, she lived in a small town in hawaii untill her dad got a promotion and he told her that they are moving to L.A she was furious so she ran into the forest near her house and took an unexpected swim in a mysterious bay. Ever since then evrey time she totched water her legs turned into one long aqua fin. She meets a boy named Gale,who she quickly fell for,but when Taylor comes along assigned to kill her, will Vanessa rethink her feelings for Gale and want to be with Taylor and their forbbiden Love? or will she go with the boy she has to lie to?