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.
An investigation into the theft of a state-of-the-art military helicopter for use in the drug trade leads Walker to a former fellow Marine Corps officer, who abandoned his unit 25 years ago in Vietnam.
Walker and Trivette are in the midst of investigating a trio of college students who use the drug rohypnol to subdue unsuspecting female victims in nightclubs, when their friend Darcy Reynolds is raped on her 21st birthday. After another one of their victims is killed, the trio become willing to try anything to shake the Rangers.
Alex, C.D. and a group of fifth- and sixth-grade students from a Dallas-area elementary school are kidnapped by mercenaries, who demand $10 million in ransom. To ensure their demands are met, the crooks trap the victims in the bus and park it in a landfill, then cover it with mud. Walker and Trivette race against the clock to save the students and their friends and capture the criminals - also well aware that a deadly storm system with a history of spawning deadly tornadoes.
Walker's friend Father Blake is besieged by a ruthless developer who plans to build shoddy condominiums on the same site that the priest has announced plans to build a shelter for the homeless. The developer's cronies assault Blake, but a down-on-his-luck veteran and his faithful canine companion, Lucky, witness the crime. "Soldier" goes into hiding, so it is up to Lucky to aid Walker in his search for witness and help derail the developer's crooked plans.
When a friend of Walker's who is a Reverend dies, his son, Trent who's one of Walker's students who has been an instructor at the Army returns home. He is uncertain of what he's going to do. He doesn't exactly want to be like his father and would like to help people like Walker but doesn't want to carry a firearm. At the same time someone is killing cops and Walker is wondering why. And among his targets is Carlos, a friend of Trent's
Joey Prado, the professional kickboxer whom Walker trained and helped when he was in trouble, has just graduated from the police academy. And he gets an assignment which has him going undercover to get a guy he knew who is now a drug dealer, who has plans to give drugs away. And the guilt of deceiving the guy gets to Joey.