Libby Thump still wishes for a horse of her own, but she's very happy riding Princess, the aging horse who belongs to Sal, the stable owner of High Hopes Farm. Libby loves Princess and her gentle ways, and Princess loves Libby. Then one day Sal says she has to ride Saddleshoes instead--and Saddleshoes is the most difficult pony at the stable! Sal says Princess is too old to be ridden much longer and that Libby is outgrowing her, so Libby is stuck: ride Saddleshoes, or don't ride at all. But Libby is nothing if not determined, and so she decides that the only way to live up to her potential and achieve her dream of being the best rider in the world is to try something new. Can she find a way to win a blue ribbon riding Saddleshoes?