Walker, Trivette, Alex, Gage and Cooke go to another city to play baseball with the city's police department. Alex meets with the D.A. who is a friend to talk about a major drug bust they made. Later two cops are waiting for someone when three detectives come in and try to kill them. One of them is killed, the other gets away. He makes his way to the courthouse and the detectives chase him, he runs into the D.A.'s office and they shoot the D.A. Walker shows up and tells them to get out. He then talks to the cop who claims that he has proof that the three detectives are stealing drugs from their busts. Walker finds it hard to believe and sends Gage and Cooke to look into it and learn it might be true. Walker thinks that one of the city's high ranking cops might be working with the detectives.

A new drug called the White Buffalo hits the streets and Alex, Sydney and a young child find the drug dealers while they are hiking. Sydney is shot by the drug dealers. Walker investigates a buffalo statue that appears to be crying tears.

Walker and his team are still searching for the man who is eliminating undercover agents. He gets a lead when the son of a mobster goes to people who pay his father for protection asking for more. When one of them decides to go to his father and tell him what he id doing, he kills him. Someone sees it and tells Walker. Walker then sets out to get the mobster's son. The mobster then goes to the Chairman to deal with this.

The explosive conclusion of the Rangers' on-going search for the elusive and resourceful Chairman.

Walker takes in a young boxing prodigy after the boy's parents are killed in a car accident. Meanwhile, Rangers Sydney and Gage go undercover to take down a drug ring.

Walker and the others are working on reports that the mob is making a move on Dallas and they are forcing criminals to turn their operations to them or else. At the same time his friend who owns a club, borrowed money from someone who works for the mob. And after he pays them, they insist that he give them ownership of the club. When the mob boss arrives, he tries to kill him but Walker stops him and they agree to work together to get them.

After a lawyer who is representing a man who was beaten when he was arrested is shot. Walker and his team must find out who shot him.

The daughter of a Dallas billionaire is kidnapped by her bodyguard and held for ransom on a nationally televised website. Walker and the rangers have only six hours to save her before she dies.

After a trial where a crime boss is found guilty, the head juror is killed. The Rangers connect the murder to the son of the convicted criminal. Others are in danger from the son's revenge for putting his father in prison.

Sydney and Gage go undercover to bust a biker gang that has been dealing drugs to illegally-licensed truck drivers; one of which caused a fatal highway accident that first alerts Walker and company to the operation.