Boss has a crook named Geraldo run the Dukes off the road. They are helped out by a boy named Pepino and his racehorse, El Blanco. Pepino is racing the next day to save his grandfather's ranch. Geraldo wants his horse, El Diablo, to win so he has Boss steal El Blanco. The Dukes have to find the horse, win at the track and get back in the race.
