A couple of bandits plan a stage coach robbery, and in the process, one tells about his straight laced twin brother. In town, they discover the twin, Ned is there, and plans to become a prospector. When bandit, George, learns that Ned is leaving on the stage to head for the gold mines, George gets the idea to set up Ned to take the fall for his planned crime. Meanwhile, Cisco and Pancho talk about a past experience they had with outlaw, Denver George. It looks like paths are about to converge, but not fast enough. The bandits rob the stage, and shoot the marshall who was onboard.
True to George’s plan, his brother Ned is picked up and blamed. Cisco has a feeling that the wrong man was arrested, and tries to convince the sheriff, but nobody believes Cisco. When Cisco talks to the man in jail, he clams up when he hears the name of Denver George, but Cisco cant’t figure out wy he would want to be hanged for another man’s crime.
Out on the range, George is pleased to know his brother is taking his fall, but is a little rattled to hear that Cisco is poking around. Does George have anything to worry about? Cisco runs his own investigation in secret, since the sheriff isn’t doing any.
Ned is broken out of jail, and our heros ride fast as bullets fly close on their heels. Cisco finally gets a confession out of ned, and now it’s time to lay a trap for George before he can do anymore harm. The trap is sprung, and a fist fight subdues Denver George. Just in time for the sheriff to arrive with his posse. The identical twins pose a problem to identify, but Cisco has a plan for that as well.