All of AJ's dreams seemed to be coming true when her parents bought her a pony of her own, but the reality has turned out to be quite different. Squib is young and difficult to ride, and without enough knowledge and support to know how to fix things, AJ feels like she's just going around in circles without any hope of ever improving. Then a chance encounter leads her to Katy, who has practically grown up on horseback and has a string of talented jumping ponies. The two girls quickly become friends, and soon AJ is making the kind of progress she'd only ever dreamed was possible. As the world of competitive show jumping is opened up to her and Squib begins to show his true potential, AJ starts looking forward to a fun season ahead. But there's something that Katy's not telling her, and it's going to change everything between them...