In 1967 the Vietnam War grows bloodier. After months of combat the few remaining men of a Marine rifle squad must endure seven more months of war. Natural and supernatural forces blend finely together in the land they fight. Reality and fantasy become increasingly difficult to distinguish. For Sergeant Robert Mann, keeping himself and his men alive is unexpectedly twisted by a moral dilemma. Seemingly complicit in murder, Mann makes the decision to forget; let amnesia do its work. Mann's moral being further unravels despite his struggle to keep control. He forgets how to sleep. As he nears a point of dissolution, Mann decides to confess his sins to his commanding officer. But in Vietnam, spirits of the dead are always roaming about and the real and the unreal are hard to tell apart.