Stage to Chino plot
"Mail robbers on the rampage!"
Caroline McKay becomes the owner of a stagecoach line between Prescott and Chino after her father dies. Her uncle Charles Lait who runs the stagecoach line for her is in a plot with Dude Elliott to force Caroline to sell the line cheaply. Elliott's henchmen raid the stagecoach containing Caroline and attempt to steal the mail. This is thwarted by Dan Clark, a postal inspector who is on his way to Chino to investigate the ongoing sabotage of the stagecoach line. Caroline appoints Dan as the coachman, unaware of his actual mission. Dan accepts the job so he can do his job as an inspector undercover.