 A group of outlaws posing as Southern sympathizers and led secretly by freight-line owner Jim Maroon (Roy Roberts) are raiding stagecoaches, and this is a threat to the Union communications. Grif Holbrook (Rod Cameron), a trouble-shooter for the Butterfield Stage Line, and Union man Barney Broderick (Wayne Morris) team up to try and put a stop to the activity, when they aren t fighting over the charms of Kate Crocker (Kay Buckley).