After moving from the city out to the horse ranch with her family, Kirstie Scott leads a pony trek through Miner's Ridge when a sudden storm causes a landslide. Trapped alone in Dead Man's Canyon with a herd of wild horses whose leader--a proud, black stallion--has been hurt by falling rocks, she must find a way out and help the injured stallion.

Thirteen-year-old Kirstie gets into trouble when she tries to help a mistreated horse escape from a neighboring ranch.

When Starlight's young owner, Jay, falls ill, the Scotts take the horse in. But the restless, highly strung horse doesn't settle, so Kirstie fixes a secret meeting for him and Jay. The reunion is a great success, but the parting almost breaks both their hearts. Now Starlight pines worse than before, while Jay's illness turns critical. Has Kirstie made a bad mistake?

"Kirstie Scott lives for horses. While at a local rodeo contest, she is horrified to see how Rocky, an injured horse, is treated. Kirstie persuades her mother to buy him, but soon learns that training an ex-rodeo horse is not easy..."--Cover back.