Before Thoroughbred, Ashleigh Griffen lived at Edgardale, her family's farm in Kentucky. Nothing could be more perfect than life on the farm with her family, her favorite horses, and her best friend, Mona. Ashleigh loves helping with the horses -- and dreaming of becoming a jockey someday ... Is Ashleigh out of her element?

Ashleigh doesn't know what to expect when she sets out west for a visit with her cousins. Everything works differently out there -- but the races are still exciting. For the first time in her life, Ashleigh gets to participate in rodeos and mustang roundups. But Ashleigh's soon faced with a challenge. Her cousin Kaitlin's favorite colt, Bold Ranger, isn't doing very well -- so Kaitlin's parents decide not to race him anymore. Kaitlin's crushed, which makes Ashleigh determined to find a way to help Kaitlin get Ranger back in racing form. But will she be able to do it in time?