He was one the best Marine snipers in Vietnam. Today, 20 years later, all Bob Lee Swagger wants is to be left alone. But a shadowy military organization seduces him into one last mission for his country - unaware until too late that the game is rigged. The assassination plot is executed to perfection until Bob Lee Swagger, alleged lone gunman, comes out of the operation alive, the target of a nationwide manhunt, with his only allies a woman he just met and a discredited FBI agent.

Earl Swagger is tough as hell. But even tough guys have their secrets. Plagued by the memory of his abusive father, apprehensive about his own impending parenthood, Earl is a decorated ex-Marine of absolute integrity — and overwhelming melancholy. Now he’s about to face his biggest, bloodiest challenge yet. It is the summer of 1946, organized crime’s garish golden age, when American justice seems to have gone to seed for good.

Lamar Pye has escaped from Oklahoma State Penitentiary, accompanied by his idiot cousin and a vicious but cowardly artist. To have stayed in prison was certain death, but his chances on the outside are not much greater: his excesses know no bounds - one killing follows another. But one murder brings his nemesis upon him: Bud Pewtie of the Highway Patrol loses his partner in a blood-soaked shoot-out with Lamar, and from that moment on, nothing will stop him from getting even.

On his last combat deployment, Lt. Cmdr. James Reece's entire team was killed in an ambush that also claimed the lives of the aircrew sent in to rescue them. But when those dearest to him are murdered on the day of his homecoming, Reece discovers that this was not an act of war by a foreign enemy but a conspiracy that runs to the highest levels of government. Now, with no family and free from the military's command structure, Reece applies the lessons that he's learned in over a decade of constant warfare toward revenge.

Court Gentry is known as The Gray Man—a legend in the covert realm, moving silently from job to job, accomplishing the impossible, and then fading away. And he always hits his target. But there are forces more lethal than Gentry in the world. And in their eyes, Gentry has just outlived his usefulness. Now, he is going to prove that for him, there's no gray area between killing for a living-and killing to stay alive.