Kirsty Tate and Rachel Walker are having a fantastic time helping out at the Wild Woods Nature Reserve. But nasty Jack Frost has stolen the Animal Rescue Fairies' magical key rings, so he can have his own personal zoo. Rosie the Honey Bear Fairy needs Rachel and Kirsty's help! If she can't get her magical key ring back, then Billy the bear cub will be whisked off to the Ice Lord's zoo, never to be seen again...