When the Mooney family takes up resident at the McMurray farm, Mary and Jody are worried about the "intruders" and Willie feels his livelihood slipping away. But new challenges soon arise as they continue training Star of Wonder for his first horse show. When the cantankerous colt is involved in a terrifying accident just a week before the show, the girls turn to Willie for help. When show day finally arrives, a menacing threat from a mysterious stranger threatens to take Star from them forever