Young Alec Ramsay is shipwrecked on a desert island with a horse destined to play an important part in his life. Upon rescue, their adventure continues in America.

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.