When transplanted Texan Bob Seton arrives in Lawrence, Kansas he finds much to like about the place, especially Mary McCloud, daughter of the local banker. Politics is in the air however. It's just prior to the civil war and there is already a sharp division in the Territory as to whether it will remain slave-free. When he gets the opportunity to run for marshal, Seton finds himself running against the respected local schoolteacher, William Cantrell. Not is what it seems however. While acting as the upstanding citizen in public, Cantrell is dangerously ambitious and is prepared to do anything to make his mark, and his fortune, on the Territory. When he loses the race for marshal, he forms a group of raiders who run guns into the territory and rob and terrorize settlers throughout the territory. Eventually donning Confederate uniforms, it is left to Seton and the good citizens of Lawrence to face Cantrell and his raiders in one final clash.

When Rocklin arrives in a western town he finds that the rancher who hired him as a foreman has been murdered. He is out to solve the murder and thwart the scheming to take the ranch from its rightful owner.

An evil scientist invents a earthquake machine and plots to take over the world from his base in Africa.

US Marshall Vance is assigned to rid the Oklahoma Territory of outlaws.

Bat Masterson's old friend Billy Burns convinces him to become marshal of Liberal, Kansas and help the residents fight drought and a destructive range war.

After some gun play with a posse, the James Gang head for Quinto in a section of land which is not a part of America. Anyone there is beyond the law so the town is populated with outlaws. Next to arrive is Sheriff Rowley, following his brother whom the Gang have brought in injured. Rowley has no authority and gets on well enough with the James boys but is soon involved in other local goings-on, including a move to vote for annexation with Oklahoma which would allow the law well and truly in.

John Dawson loses control of his factory when he is crippled in an accident caused by a rival. Destitute, he travels the country organizing the homeless to help him regain control of his steel mill.

Dirigible commander Jack Braden and Navy pilot 'Frisky' Pierce fight over the glory associated with a successful expedition to the South Pole and the love of beautiful Helen, Frisky's wife. After Braden's dirigible expedition fails, Frisky tries an expedition by plane. Unfortunately he crashes and strands his party at the South Pole. Braden must decide between a risky rescue attempt by dirigible and remaining safely at home with Helen.