A boy and his archeologist friend spend two weeks on a desolate Caribbean island where they discover a hidden valley, underground tunnels built by Spanish Conquistadors, and a wild flame-colored stallion.

The black stallion helps save an Indian tribe during a time of disaster, thereby fulfilling an ancient prophecy.

Driver-in-training Tom Messenger gets the chance of a lifetime--to race Bonfire, the second son of the Black Stallion. But does an untried kid like Tom have what it takes to make the colt a champion? A boy is entrusted to attend the birth, train, and drive a blood bay colt that is the great hope of an aging reinsman who refuses to be reconciled to the fact that sulky-racing has moved from the county fair to the big night time, moneymaking raceways....

Alec Ramsay has a hard time persuading his partners to retain the girl he hires as a trainer and an even harder time convincing them to let her race the Black Stallion when Alec is suspended as a jockey.

Young Alec Ramsay is shipwrecked on a desert island with a horse destined to play an important part in his life.