Crumble cakes! A red rogue wind is blowing and a wicked pirate captain and his crew are marauding the seven seas near the island left off the map of the world. A rare egg has gone missing and a very unhappy sea dragon wants it back. A pirate ship, the Kettle Black, is anchored in a secret cove off the island left off the map of the world. Betsy and her mum, Myrtle the mermaid, must dive deep beneath the waves, while Alfonso Glory and Mr Tiger fly high above the clouds in a hot air balloon...