Judy Garland's first starring role and her first of many movies with Mickey Rooney is a predictable racehorse story with a couple of tunes tossed in to liven up the hokum plot. Young Roger Calverton (Ronald Sinclair, a 14-year-old then being groomed as the new Freddie Bartholomew)
arrives in the US with his crusty grandpa Sir Peter (C. Aubrey Smith). The Calvertons own a racehorse named The Pookah and want to put it on American tracks and make a killing. They offer young jockey Tim Donahue (17-year-old Rooney) the chance to ride and Tim accepts, feeling that this is a
winning horse he can take to the finish line ahead of the pack. Unfortunately, Tim unwisely falls ...