Life at Tall Oaks is great for Allie, but she's watching her friends Melanie and Kevin struggle with Jinx, the talented Thoroughbred colt they want to run in the Kentucky Derby.

If Allie could just pinpoint the cause of Jinx's misbehavior, maybe they could fix the problem and he'd have a good shot at a Derby win. But tension is running high at the farm, with Melanie and Kevin bickering over Jinx's training, and even worse, Cindy, Allie's foster mom, and Ben, the farm owner, seem to be having troubles of their own. Can Allie help the people and horses she cares so much about, or is Tall Oaks teetering on the brink of disaster?