In the middle of a pictorial lecture on his recent expedition to the Mongolian Desert, Dr. John Benton,the famous explorer, drinks from the water bottle on his lecture table, collapses and dies. His last words "Eternal Fire" are the only clue Chinese detective Jimmy Wong and Captain Street of the police department have to work on.

When two of their Marshal friends are killed, the Rough Riders are sent to investigate. They have to find the killers in a ghost town where the houses and an old mine are interconnected by secret passages and tunnels.

This one starts differently but, in the end, it is another version of Robert Emmett Tansey's oft-used plot of "employing bad guys as good guys to help the good-good guys capture the bad-bad guys." The warden of the Desert Wells Penitentiary asks Tex Reed and Slim to check the series of bank robberies which have been committed by escaped convicts. Lockwood, head of an opposing political machine, is behind the escapes and robberies, and the escapes are being planned by Red, a convict. Tex trails the next escapee but the hang shoots the man before Tex can question him. Jimmy, brother of Tex's girl friend Mary, is set up, by the gang, to be killed while robbing a bank by Carter who will collect a reward for shooting him. Jimmy is wounded but not killed and Tex arrests him to keep him safe. The gang now wants to get rid of Tex, so they send Red, dressed as a prison guard, with a fake message from the Warden for Tex.

It's Wild Bill Elliot as Wild Bill Hickok in the Columbia B-western Lone Star Vigilantes. Returning from Civil War duty, Hickok, Tex Martin and Cannonball find that their Texas home town is under the rule of Colonel Monroe, a bush-league dictator with his own police force. In true Hitlerian fashion, Monroe extorts huge sums of money from the populace, terrorizing them into silence. Our three heroes set about to put an end to Monroe's regime, with time out for Tex Ritter's musical interludes.

Bob Day has been captured by Marlow's gang. When Tim Barton and sidekick Monte come looking for him, Tim is also captured. Escaping, Tim has a plan that will have the outlaws fighting among themselves.