He vowed to defend his brothers-in-arms. Now, he'll stop at nothing to avenge them.

After a deadly ambush leaves Marine Raider Captain David Shaw gravely wounded, he returns to the US to face an unwanted medical retirement. But when he's invited to observe his team's next mission in Yemen, he watches in horror as their helicopters are shot down—wiping out the men he swore to protect.

Shattered but determined, Shaw refuses to stand down. With nothing left to lose, he orchestrates one last mission to hunt down the terrorist leader responsible. As he tears through enemy ranks, a chilling truth emerges—these militants are using American-made weapons.

A deeper betrayal is at play, and the real enemy might be closer to home than ever anticipated.

From the war-torn cities of Yemen to the treacherous underworld of international arms dealers, Shaw follows the blood trail to an explosive truth: someone inside the US military is profiting from the deaths of its own soldiers. With the help of rogue CIA operative, Natalie Hale, and the last of his men, John Wyatt, he takes the fight right to the doorstep of the nation's highest and most lethal military powers.