Fifteen-year-old Katie Harrison gets a Morgan horse, Summertime, for her birthday. Katie has always wanted a horse of her own and has plans to raise, train, and show horses when she grows up. She is ecstatic when she finds out Summertime is in foal. Katie sees this as the start of owning a herd of horses. Her hopes are dashed when her mother tells her that can’t afford to keep two horses.

When Katie has a riding accident, Mrs. Harrison thinks Summertime is too dangerous to ride and insists her husband sell the horse. With the help of her friend Brian, Katie discovers why Summertime is difficult to ride and cures the problem.

Determined to find a way to earn money so she can pay for Summertime’s foal’s keep, she decides to enter a horse show to win the prize money. However, the road to the horse show is paved with many obstacles, including one incident where Katie fears Summertime may die.

Travel the road to the horse show with Katie and find out if she makes it to the horse show.