Four friends set out to rescue two horses trapped by a wild fire in the Rocy Mountains.

Cousins Alison and Becky travel to Wyoming along with their friend Meg to spend their school holiday on a horse ranch, but Alison's foul mood threatens to make the week more a trial than a treat until she finds purpose in caring for a sick wild horse.

Unhappy vacation-mates Becky, Meg, and Alison are distracted from their bickering by a phantom horse and soon find themselves forced to pull together when a friend gets trapped in an abandoned mine shaft.

Alison Chant is angry at the world. She wants a new horse, but everthing gets in her way. First, her mom says, "No more horses!" Then, she finds the horse of her dreams, but it belongs to a young girl named Kristy Jones, who refuses to sell her beloved Skipper. Finally, Alison takes matters into her own hands, only to get Skipper and herself into terrible trouble at a barrel race. Who can save her? Will it be Chuck McClintock, the goofy, redheaded...

The future of Mustang Mountain Ranch is in jeopardy: the government wants to close the ranch. Starting a horse camp for kids might be the only way to save it.. Meg is worried about the future of the ranch, but she's thrilled to be spending the summer with her best friends Becky, Alison and Thomas, the boy she's crazy about. Inspired by the legend of a jade rock hidden in the cave of the stone horse, Meg and a group of uncooperative campers set out...