It was American and a friend of Serling is killed. He's now riding a desk at the Pentagon, where he's charged with investigating candidates for the Medal of Honor. Initial reports indicate Walden saved lives on her crew and that of the other copter, single-handedly fending off fire from the enemy. He's driven not only by his own willpower but pursued by his own demons. The Army is seeking to cover up that the Serling's tank battle involved unfriendly friendly fire.
Interviews go well at first.
Then comes Sgt. He plants seeds of doubt about Walden's escapades. Serling finds those doubts growing. A career military man, he made a snap decision that cost a friend's life, then was rewarded for it while his superiors covered up the down side of his deed. Bursts of high-energy military maneuvers are integrated with the early languid development of the mystery.