 Ashleigh's parents, Derek and Elaine Griffen, take over at the breeding area of Townsend Acres after their own farm, Edgardale, has to be sold because of a virus that spread around the farm and killed both mares and foals.Ashleigh dislikes her new life at first, but becomes more accustomed to it after an older mare named Townsend Holly gives birth to a small filly whom she names Wonder.Though Wonder is very weak and nearly dies multiple times, through Ashleigh's care, the filly grows up to be a Kentucky Derby and Belmont-winning racehorse.