Sergeant Johnny Gallagher is tasked with escorting a mysterious American prisoner, Thomas Boyette, back to the United States from Germany during the Cold War. Unbeknownst to Gallagher, Boyette is not what he seems. Shortly after landing in Washington D.C., Boyette escapes, leaving Gallagher in hot water with his superiors. As Gallagher investigates, he uncovers a conspiracy involving high-ranking military officials and a plot that could destabilize international relations.

Determined to redeem himself and get to the bottom of the mystery, Gallagher teams up with his ex-wife, Eileen, who is also a military officer. Together, they delve deeper into the web of deceit, finding themselves targeted by those who want the truth buried. Their pursuit takes them across various locations, uncovering more about Boyette's true identity and the dangerous plan in motion. As Gallagher and Eileen race against time, they face numerous obstacles and life-threatening situations that challenge their skills and resolve.