Brenda Edel's champion stallion has disappeared. Was he stolen, or is it all an accident? Shelby resolves to find out. Meanwhile, a touring trick riding troupe have set up on the other side of the Gully. Shelby's trusty pony, Blue, with his festive coloring and solid laid-back style, makes a perfect trick riding mount, and Shelby improves quickly. Should she join the troupe and leave her old friends from the stables and Pony Club behind?