The ghosts of past wars follow a Wyoming cowboy and a self-made wealthy man as they journey to Tibet on a quest. Along the way they meet a Tibetan father-daughter team driving a yak herd back to their village to replace the one they lost and restore their livelihood. The Americans quickly become embroiled in a war between the Tibetans and an outcast family member bent on stopping them. The Americans have to face their pasts and channel feelings they thought were long behind them to fight the new threat. In the process, they risk losing themselves to their inner demons and becoming like their enemy.