Hettie's dog Kittie has disappeared. Anxious to find him, Hettie asks Cressie for a "lost and found" spell to bring him back. Unfortunately Cressie doesn't quite get the words right and Hettie also brings back an assortment of long lost and unwanted objects, including a tiny gold key. Searching in a secret room, Dyllis and Horrocks find a beautiful box and use the key to unlock it. The two girls unwittingly release a fierce storm which was trapped inside the box and now starts to swirl out of control around the school, threatening to destroy Cackle's Academy for ever.