In the monsoon season of 1968-69 at a fire support base called Matterhorn, located in the remote mountains of Vietnam, a young and ambitious Marine lieutenant wants to command a company to further his civilian political ambitions. Two people stand in his way. The first is a well-loved combat-weary lieutenant his own age who desperately wants out of the bush but who does not want to leave his Marines with an inexperienced and overly ambitious officer. The second is an angry leader of the company's radical blacks, who has all the political skill, savvy, and ambition of the protagonist. As the young lieutenant experiences the costs of combat, he sees the terrible results of his actions and begins to question the value of ambition and skill over compassion and heart.