The only thing 16-year-old Heather desires more than a Thoroughbred jumper is handsome David. Her horse Possum, a lovable gray gelding of questionable ancestry, can never match best friend Sheila's Thoroughbred, but David is slowly becoming more than a study companion. Then Sheila zeroes in. When Kevin Quinn, Heather's mysterious neighbor, suggests they train Possum to jump, she thinks it's nothing more than a summer pastime, until September finds them at the Utah State Fair, pitted against Sheila and her seasoned jumper, Pagan. Will Possum meet the challenge? Is Kevin's secret past a threat to Heather and her widowed mother? Will Heather and David rekindle their budding romance, or will his interest in Sheila continue to sizzle? Is Heather and Sheila's friendship doomed forever?