Sara Mason and love interest, Huxley Keane, follow a trail of clues in an attempt to match a bullet-scarred key found in the Vietnam jungle. An apartment key was given to Rocky, Huxley's brother, by his fiancée. If sweet Emma Ellis kept a matching key all these years, it would prove Rocky is not MIA, but deceased. Tracing Emma proves to be a perilous escapade; she doesn't wish to be found and attempts to stop Sara and Huxley, whose very lives are threatened. In separate incidences, both Sara and Huxley are left to die of their wounds. And when they finally catch her, horrifying truths about the woman send their sensibilities reeling.