Pippa's best friend, the Princess Pony, Stardust, has come all the way from the enchanted island of Chevalia to visit, and just in time for tomorrow's gymkhana at the riding school. Pippa has been waiting all through the summer holiday for the gymkhana, and it would be her dream come true if she won a rosette on her favourite pony, Snowdrop. But when Pippa arrives at the stables the next morning, Snowdrop and her riding school pony friends are nowhere to be found! Princess Stardust has an idea who is responsible. For the show to go on, Pippa and Stardust must return to Chevalia – and quickly . . .