The Marshal sends John Weston to a rodeo to see if he can find out who is killing the rodeo riders who are about to win the prize money. Barton has organized the rodeo and plans to leave with all the prize money put up by the townspeople. When it appears that Weston will beat Barton's rider, he has his men prepare the same fate for him that befell the other riders.
Not a bad little effort from the Duke, this - providing you can overlook his rather terrible song at the beginning. He arrives into town amidst a shoot-out and next thing he is involved in helping the marshal (Gabby Hayes) to investigate some dodgy, lethal, rodeo-rigging. The use of actuality rodeo footage rather spoiled this for me, but probably saved a few bucks which they invested in a good fun soundtrack that accompanied this fast-paced fifty minutes of adventure.