When law and order fade into distant memory in Angel City, the townspeople yearn for the era of the Iron Riders, a band of men who took justice into their own hands and brought order out of chaos. The organizer of the group was John Lannigan, whose son Larry decides to take up the mantle of the Riders once again. After a shooting incident, Larry dons the black robe of the order and demands that the killers be brought to justice. Taking advantage of the Rider's masked identity, the town's corrupt Sheriff Donovan robs a saloon and blames it on the Rider. Thinking that the thief is his son, John Lannigan shoots at the masked man, who manages to escape. Larry, aware of the sheriff's infamy, is reluctant to expose him because of his love for Mera, Donovan's daughter. After rescuing Mera from the villainous Jim Mason, Larry reestablishes his honor and restores order to Angel City.