Notorious outlaw Jud Starr is rescued by his gang. Under Jud's leadership the outlaws raid the Cimarron Strip and use the Cherokee land as a haven. Marshal Crown captures Starr on the eve of a wedding to an Indian woman and must take his prisoner back to Cimarron with Starr's gang in hot pursuit.
When a parson is shot, Crown arrests the son of a prominent rancher. When the preacher recovers and refuses to press charges, a rabble-rousing saloon owner and his gun-toting sidekick try to organize a lynching party.
Marshall Crown convinces the gunslinging Gauge brothers that they will receive a fair trial if they turn themselves in. A wealthy rancher decides to seek gun justice and hires a pair of bounty hunters to exact retribution.
When a young Indian is killed after challenging the accuracy of a battle depicted in a Wild West show, Marshal Crown must prevent the young man's father, an Indian chief from avenging his son's death upon the star of the show.
A hell-raising cavalryman's escapades cause trouble for both Marshal Jim Crown and his post commander. His destructive exploits lead to violence as he flouts not only the law but a vigilante committee formed to kill him.
When Marshal Crown is wounded during a failed attempt to free a man arrested for murder, Dulcey, some Cimarron townsmen and the outlaw's family launch a desperate search. A peddler finds Crown, but the only doctor in town is now considered a quack.
While pursuing an escaped prisoner, MacGregor is arrested for murder by an old enemy of Marshal Crown's and is sentenced to be hanged. He escapes from jail with Sarah Lou Burke, another falsely accused prisoner. Crown tries to find the escapees before the vengeful posse can find and kill them.
Marshal Crown tries to prevent the Houston clan from entering the Mocane Valley before it's open for settlement. The Houston's believe they'll have little competition for prime land because of the legend of a malevolent beast thought to lurk in the valley. When the wagon train is destroyed and most of its travelers killed, Marshal Crown and his men search for the culprits not knowing if their quarry is man or beast.
Mobeetie, a cowpoke with a cowbell around his neck, becomes a pain in the neck for Marshall Jim Crown during a heat wave, when a trainload of dynamite is stuck in the middle of Cimarron and the railroad can't move it for a couple of days.
When a band of wolf hunters, whose very success has put them out of business, are becoming a problem for the settlers of the Cimarron Strip. Broke and hungry, they resort to killing cattle for sustenance. Marshal Crown offers them a section of land to homestead, but their leader, Sam Gallatin, believes that the life of an outlaw is preferable to that of a dirt farmer.
Marshall Crown hires a one-handed gunslinger as a deputy, not realizing the man has assumed the identity of a slain lawman and is intent on avenging himself on members of his former gang who abandoned him after he was wounded in a payroll hold-up.
Marshal Crown "sentences" a trail boss to the position of Deputy Marshal in a nearby town to run concurrently with the hard-labor sentences his men are serving for various crimes. A vindictive judge releases the hardcases hoping they will cause trouble for their former boss.
Marshal Crown and his posse thwart a payroll robbery and capture or kill all the entire outlaw gang. The leader is sentenced to ten years in territorial prison, but Crown can't gather enough evidence to charge the youngest member. When the youth decides to stay in Cimarron, the marshal arranges for him to work with an reclusive horse trainer and the youngster takes to both the job and his new boss. His new loyalty is put to the test when the gang leader escapes from jail and returns to Cimarron seeking revenge.
Marshal Crown is shot while pursuing a murderous gang of outlaws who prey on isolated Indian villages. He is found, hidden and nursed back to health by Heller, a young woman who was raised by Indians but now works for the outlaw gang. Crown and Heller escape to Cimarron, but are pursued by the outlaws who want to punish Heller for her treachery.
Marshal Crown, during the course of an hauntingly foggy night, hunts for a killer who is butchering his victims. Francis tells crown about how police in London were unable to solve a similar set of killings earlier that year -- by someone who called himself Jack the Ripper.
Sergeant Clay Tice a free-wheeling cavalry veteran, clashes with his Sergeant-Major Chambers, a by-the-book disciplinarian. When the Sergeant-Major catches Tyce courting Dulcey at the Wayfarers Inn instead of searching for rustlers with his cavalry patrol, the junior non-com is given a choice of resigning or facing court-martial. Tyce resigns, then rounds up several malcontents from his old troop and stages a kangaroo-court in the Wayfarers Inn with Chambers as the defendant.
While escorting a man to his trial in New Mexico, Crown is attacked by a pair of outlaws and stripped of his badge and identification. While chasing the escapee, the pursuer becomes the pursued when a vengeful posse and a grizzled bounty hunter mistake Crown for a killer.