Katie has a secret -- her four best friends are fairies! They need to save the magic oak that connects the fairy and human worlds. Each book brings them closer to completing this important fairy task! Katie has never ridden a horse. But when the class bully, Tiffany, challenges her to a riding contest Katie can't say no -- the winner gets a ring that the fairies need to complete their fairy task! Katie doesn't think she can possibly beat Tiffany. But a little fairy dust brings some toy ponies to life and Rosehip holds riding lessons in Katie's backyard. Soon Katie learns how to ride a horse -- and even how to jump! When the day of the contest arrives, it will be up to Katie to save the day -- but she's got the best friends ever there to root for her!