Tom Hardy (Tom Mix), a pony express rider, is carrying government gold in a coach to Wassatch accompanied by Alice Calhoun (Sharon Lynn) , the daughter of the US telegraph survey station. The gold is to pay for the US Telegraph Survey and it is to be delivered to the survey chief, Jim Calhoun (Thomas Lingham). The coach is attacked by bandits led by the Slade (Duke Lee) and Kane (Mark Hamilton).
Roddy Forrester has formed the White Mice club with a pal. The purpose of the club is to help those in trouble. When Roddy's father sends him to the South American republic of Montebello, he gets his chance to be of service. General Rojas, the former president, is locked away in a prison and slowly dying. Roddy decides to rescue him, especially since he has been inspired by the general's pretty daughter, Inez.
A grease monkey discovers a defect in an auto engine being turned out by his employer. But since our hero discovers this only after losing an important race, his boss chalks up the loss to Fairbanks' supposed cowardice.
