When teenager Alec Ramsay survives a shipwreck, he is stranded on a deserted island with a magnificent, wild black stallion. Through patience and courage, Alec earns the trust of the powerful horse, forging an unbreakable bond. Rescued and returned home, Alec faces the challenge of adapting his wild companion to civilized life, leading to an opportunity that could prove the stallion's incredible speed to the world.