When Marina Blue discovers that she is about to be dragged away on holiday to a dismal cottage on a windy clifftop, she yearns for something amazing to happen in her dull life - little does she know help is close to hand in the form of her creepy next-door neighbour, Runa Rockbottom, who gives her an unusual mermaid pendant. One day, from the clifftop Marina spots a shoal of extraordinarily large fish. But are they fish or are theymermaids? Do mermaids even exist? Does the strange pendant have the ability to attract mermaids?Marina sets out on a mission to find out, a mission that unwittingly catapults her into The Something Else shop where she meets action hungry Ricky Rock. The pair embark on an adventure to find the mermaids, but unbeknown to them they are being hotly pursued by an evil duo who are hell bent on stealing the precious pendant to capture the rare blue-tailed mer-goddess. Can Ricky and Marina stop them?Why do they want to capture the goddess?What other powers does the pendant have?Follow Ricky and Marina on their epic adventure in the uneventful seaside town of Rock-a-Nore as they uncover the secrets of the pendant and the eccentric Runa Rockbottom in their race against time to save the Mer-goddess and Mer-kind from doom.