Before the race, Chandler and Tracy trick the gambling-prone Cactus into a wager in which Tarzan will be the prize if Ken loses the race. To assure their victory, Tracy sets up a trip-wire on the course, which injures Tarzan and allows Tracy to win the race. After he discovers the broken wire and suspects foul play, Ken refuses to give up his horse to Chandler. Shamed by his foolish behavior, Cactus vows to identify the saboteur, whose boot prints he discovers in the ground near the wire.