Sidney McQueen flees to the small, west Texas town of Alpine to escape the most dangerous man she's ever known - her estranged husband - a powerful attorney with ties to Mexican drug cartels. When circumstances throw her into the path of Markus Yeager, he is immediately suspicious. And, when Sidney reveals she possess something her soon-to-be ex is hell-bent to retrieve, Markus becomes embroiled in a world he thought he had left far behind. A former Marine turned CIA operative, Markus has a top-secret past with the physical and emotional scars to prove it. He is drawn into Sidney's life-or-death situation, where weapons, drugs, and money are the only gods - a world where dangerous traffickers stop at nothing to get what they want. As their mutual need draws them closer, Markus and Sidney discover a deadly predator whose web of treachery leads to terrifying violence. In a frantic race against time, can they stay one step ahead, expose a dangerous cartel, and bring a murderer to justice?