Down in the watery blue depths of the ocean is Tingle Reef - home to young mermaid Rani and a whole host of fishy friends! It's an underwater world of magic and mystery - where Rani's adventures are about to begin...Morva, a sea-witch with red hair like Rani's, is helping Rani to learn how to use her magic. But can she also help Rani to find out where she's from? Only a journey into the perilous deep blue will tell...