Walker always seems to be just one step behind a vigilante, who gets the jump on the men Walker's supposed to arrest and takes the law into his own hands.

Walker doesn't trust a couple of FBI agents, who are on the trail of a Native American accused of murder.

Alex sends Walker and Trivette to go bring back a man who killed a ranger who was sent bring him in. Walker is sullen; it seems that the ranger who was killed was a friend of his and that Walker was the one who was suppose to bring the man in but was unable to. When they get on the plane some people associates of the prisoner try to hijack the plane. Walker has the pilots dump the fuel and return to where they came from. Eventually they subdue Walker.

Walker and Trivette track a group of brothers who are robbing and assaulting people across the county. The deeper into the back country they go, it gets more difficult for Walker and Trivette. Worried, CD goes to help.

There's a reunion of former Texas Rangers and there's a shooting competition with cops from all over the country coming to take part in. An old friend of Alex's, a Senator who is rumored to be running for President is also in town. A retired Ranger and friend of Walker's is also in town and is looking for a man whom he believes is involved in the killing of a cop in another city. When Walker learns of this, he thinks the man is some kind of Black cop who faked his death is now a gun for hire. The group whom he is with is in town to do a job and the one in charge killed a cop who was coming for the competition and assumed his identity. Eventually, they learn that they're in town to kill the Senator.

Walker and Trivette attempt to take down an illegal adoption agency.

The rangers attempt to capture counterfeiters. They escape, but the rangers take the fake money into evidence. When $5 million is missing, Trivette is accused. Walker must clear Trivette's name and find the real criminals.

A geologist is killed after he claims to have found the lost treasure of Hayes Cooper, a Wild West Texas Ranger. Walker tells Trivette the story of the treasure as they investigate. Walker gets bit by a rattlesnake and has dreams of Cooper.