 Bids submitted to win the U.S. Mail contract for their stagecoach lines are entered by both singing cowboy Bill Harkins and the Banton brothers, Roy and Bart. During a stagecoach race to determine who is awarded the contract, Roy, fueled by his greed as well as his desire for Bill s lady friend, resorts to sabotaging his rival s rig in order to win. Bill, having an idea who is behind a recent rash of stagecoach robberies, devises a plan to catch the highwaymen but not before he is himself arrested for robbery and murder, having been seen committing the crime by impartial eye witnesses.