Dynamite Canyon plot
"THUNDER OVER THE SOUTHWEST!"
Duke Rand, the leader of a gang of desperados, has murdered rancher John Reed. The Arizona Ranger Colonel Blake is the only one, besides John Reed, who knows that a large copper vein has been found on the territory of the 'Reed Ranch'. Blake suspects that Duke Rand will blame the murder on the war between the ranchers and the sheep farmers. Marshal Tom Evans is tasked by Blake to investigate Reed's murder. Tom goes incognito as wanted outlaw Ed "Trigger" Jones and tries to gain Duke's trust. Duke first orders Tom to make life very difficult for John Reed's daughter Midge. But Tom soon gets into trouble when an outlaw recognizes him.