The newspaper editor of Wilcox asks the Rangers for help, and two of them are dispatched to the town. However, when they get there they find the editor has been lynched and is hanging from a tree.

A gang of desperadoes cuts a swath of murder and robbery across the whole Arizona Territory, laughing at the Rangers attempts to bring them to heel. Since the gang uses every trick in the book to cover their tracks, Rynning hires an Apache tracker to find the outlaws.

A member of the notorious Wild Bunch bandit gang escapes from Ranger Clint Travis' custody, resulting in his being fired. Furious, Travis sets out to take on the whole gang and salvage his career and reputation.

Clint Travis goes undercover as a gun smuggler to stop Mexican revolutionary Juan Morales' plans to topple the Mexican government.

The Rangers set out to stop a smuggling ring that's bringing Chinese immigrants across the Colorado River.

A gang of convicts has escaped from prison, but Capt. Rynning's can't get any more men to help capture them.

When Clint Travis is falsely accused of Murder. Rynning sends him into Galioro Mountains to prove his innocence by finding the cattle rustlers who actually committed the crime.

Travis goes after escaped con Cain Devers, a bank robber and counterfeiter who is using his counterfeit plates as part of a plot to destroy his father and younger brother.

A Ranger suddenly resigns without explanation. Rynning tries to discover what's behind it and finds that the man is hiding a secret that he won't take a chance on anyone finding out about.

The wife of a preacher who recently established a mission for Apaches living near Gaheyville receives a suspicious telegram and fears her husband has been murdered. Travis learns that a lynch mob hung two Indians accused of being horse thieves and the minister who tried to prevent the hanging. He also discovers that, in a moment of cowardice, the town sheriff failed to prevent the hangings.

Travis poses as an outlaw in what seems to be a very peaceful valley to try to find the reason behind the disappearance of a U.S. Marshal.

An Apache inherits a small ranch and his white neighbors don't care for the idea of having an Indian for a neighbor.

Rynning and Travis investigate when a number of women are murdered in a small Arizona town. Since the circumstances surrounding each murder are identical, the rangers fear that they are trying to capture a psychopathic misogynist. When Travis finds a footprint with a distinctive heel mark near the body, the lawmen search the surrounding area for the owner of such a boot.

In order to prevent the hanging of their gang members a family of outlaws kidnaps the daughter of the commander of an army post instructing him to release his prisoner or the young woman will meet the same fate. When the army carries out the execution anyway, Rynning, Travis and two undercover Army officers must free the girl before word of the gang members death leaks out.

Rynning and Travis assist the Mexican Rurales hunt down the remnants of an army of bandits who sought to overthrow the government. During the chase, one of the outlaws is killed by the border patrol and incorrectly identified as the movement's commander, Romero. Meanwhile, the erstwhile leader assumes the identity of a poor peon and goes in search of the loot from a train robbery hidden nearly ten years earlier.

In order to prevent an Indian war, Rynning must convince a religious order to leave the settlement they are constructing in Apache territory.

Captain Rynning and several of his Rangers join a posse to smoke out the remnants of Luke Baxter's gang. The outlaws momentarily give the posse the slip and double back to take refuge in a mission school run for the reservation's Indian children and hold the priests and the youngsters as hostages.

Captain Rynning sends Travis to Duncan, Arizona to investigate reports that legendary lawman Ben Salem has thrown in with the crooked town boss to keep the residents under his thrall. Travis can't believe the reports since he lived with Salem in his salad days, but soon learns that the his former idol was crippled by a gunshot and was forced to find work as a hired gun.