When a shipwreck leaves Alec--a courageous young boy--and "The Black"--a wild Arabian stallion--stranded on a desolate island, the two share a frightening adventure of survival which forges a lasting bond of friendship between them. Upon their rescue, Alec and the magnificent horse continue their adventures when they join forces with ex-jockey and horse trainer, Henry Dailey (Mickey Rooney). Recognizing the winning combination of The Black's remarkable spirit and Alec's unwavering devotion to his friend, Dailey takes both under his wing and prepares them to go head to head with the world's best thoroughbreds in "the race of the century."