The legendary Al Jolson stars as a young stable hand who rides to glory as a jockey in the Kentucky Derby atop the thoroughbred Big Boy. Talented young Gus (Jolson--The Jazz Singer) earns his place riding the steed, but unscrupulous gamblers plot to have him replaced by a jockey who will throw the race in their favor. Now, it's up to the stable boy to expose the plot and win the race.
