Summer is finally here and Carly McCallister is ready. She and her barrel-racing horse Captain have been preparing for the first horse show of the season since the last snow drift disappeared from their back pasture in April.

Unfortunately, her parents have been making plans for the summer, as well. They are preparing to move to a city three hours away, so they can more easily care for Carly's elderly grandparents. Unable to find an affordable place to board Captain, her parents make the difficult decision to sell him.

For Carly, the summer becomes a race...