The Stooges are private detectives in the Old West trying to help a girl recover an IOU from a bad guy. Their attempts to steal the IOU from the villain's wallet and then from a safe meet with problems until Curly, who goes berserk whenever he sees a mouse, knocks out all the bad guys.
Double Deal Decker

Slim Whitaker
Cowboy (uncredited)

Bob Callahan
Drunk (uncredited)

Fred Kelsey
Detective Hyden Zeke (uncredited)