Irishman Doug Monahan runs a fencing crew outside the south Texas town of Twin Wells, digging post-holes and stringing red painted barbed wire for ranchers as protection against wandering stock, rustlers and land hungry thugs. Monahan's fencing operation is opposed by Captain Andrew Rinehart, a former Confederate officer and an old-school open range baron of the huge R Cross spread. With his brutal foreman, Archer Spann, assigned to the violent work, Rinehart wages a barbed wire war against Doug Monahan. And neither side takes prisoners!

When former cattle man Dundee wanders into the town of Titusville, he's broke, tired and itching for a fight. Instead, he gets a job offer...from none other than the top man in town, John Titus. Titus recruits Dundee to find out who's rustling his extensive herd of cattle. But for Titus, it isn't enough that Dundee find the missing cattle. He wants to place the blame on a specific person...Blue Roan Hardesty, a one-time friend turned sworn enemy of the powerful Titus clan. All Titus needs is hard proof and Dundee is just the man to get it.