When Army sniper Duff Coleridge is recruited into a CIA advisor's Special Operations Group in Vietnam, he little realizes how much of his soul he will be required to sacrifice. Vietnam is a world away from Melody Hill, his home in the mountains of East Tennessee, and Duff quickly finds the clear moral lines of life back home are blurred in the glare of an enigmatic war. His CIA boss, who seems more rogue than company man, is dealing arms on the black market while delivering a seemingly arbitrary and ruthless justice to the local populace. When Duff meets and falls in love with a beautiful young South Vietnamese woman, Lynn Dai Bouchet, he is left to his own instincts to decide if her advances are based on true affection or are merely a means of exploitation. Is she as his CIA boss claims, a Vietcong spy, or is she someone like himself, trying to do her part while making the best of a bad situation? Duff soon realizes he must get out before it's too late, but only then discovers he is already trapped in a lethal game of cat and mouse.