When a woman goes against the State Police's beliefs that her father was a casualty of his own drunk driving, Walker believes her and stumbles across an illegal ring of toxic dumpers.

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.

Rustlers are stealing cattle and selling them. A cattle inspector tracks the group down, but is killed when he tries to arrest them. Walker and Trivette pick up the investigation of the rustlers and find the one who killed the inspector.

Alex is about to prosecute a man named Karl Mayes. She learns that he hired her father to defend him. Alex's father is a recovering alcoholic and Mayes gets him to drink. Eventually he's not sure if he can defend Mayes. Which makes Mayes wonder if he can trust him to keep quiet.

Thanks to Alex's lawyer father, Alfre is released from prison. She gets a job at a construction site, and soon finds the contractor is cutting corner and safety factors. She is in danger before she can report it to Alex and the Rangers.

Carlos' nephew Jesse is accused of killing a cop during a drug raid since the murder weapon is found in Jesse's possession. The gun was left in Jesse's care by one of his friends, and Jesse is forced to take the blame to protect his mother.