Jake St. Clair, ex-Army Ranger and contractor, is planning to break his brother out of a Mexican prison. He enlists the help of a long-time friend, former Special Forces officer and fellow contractor, Father Maitland. They run up against a rogue government agent and a dark entity known as the Irish and uncover a plot to smuggle terrorists across the porous Mexican border. A dangerous Iranian bomb maker and his cell have been loosed on the homeland. Operating in a landscape rife with murder, mayhem, and blackmail, it falls to St. Clair and Maitland to track down the Iranian and the Irish in the wilds of the Texas-Mexican borderlands.