There is trouble in Cimarron when Jing McQueen, the drunken son of wealthy cattleman Mike McQueen, shoots a local preacher and burns down a livery stable. When the preacher recovers, he refuses to press charges, and McQueen is released from jail, leaving Marshal Crown to control an angry lynch mob.

When Wilcat Gallagher's Wild West Show hits Cimarron, trouble starts when the shows main attraction features the reenactment of a cavalry slaughter of Indians called, The Battle Of Bloody Stones. When Indians in the Cimarron territory become angry with the way that the battle is portrayed, conflict erupts between the Indians and Wildcat Gallagher's band.

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.

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, 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.