An undercover agent takes the job of sheriff in order to find the men responsible for a series of stagecoach robberies. An undercover agent takes the job of sheriff in order to find the men responsible for a series of stagecoach robberies. An undercover agent takes the job of sheriff in order to find the men responsible for a series of stagecoach robberies. An undercover agent takes the job of sheriff in order to find the men responsible for a series of stagecoach robberies.