In this second book in the series we rejoin Molly as she navigates the stormy sea of social awkwardness, best friend fallouts and the World's Most Embarrassing Family – all while attempting to hide her (Very Weird) new double identity. (It's VERY uncool to change into a mermaid whenever you're near water... ESPECIALLY when you live in a seaside town!) There's a new family in town and everyone is going crazy for twins Serena and Finn. But they seem to have it in for Molly and her family... something fishy is going on!