Alice-Miranda has a birthday to celebrate and a village show to look forward to! One of the highlights of the Winchesterfield show is the Queens Cup horserace. But Aunty Gees prize racehorse, Rockstar, is refusing to leave the stables. That is, until Alice-Miranda introduces him to her own naughty pony, Bonaparte.
Preparations for the show are coming along well until a series of thefts rocks the community. Things quickly go from bad to worse when Alice-Mirandas beloved Bony is horse-napped. Can Alice-Miranda uncover the culprit and get her horse back in time for Rockstar to compete in the race?