Legendary mountain man John Colter survives many brushes with death, but nothing prepares him for what he faces now; after venturing into Blackfeet territory, he is stripped naked and forced to run for his life as warriors give chase.

In an epic tale of adventure, former slave Jim Beckwourth goes west to work as a trapper only to become a battle-hardened war chief of the Crow. When a conflict with mountain men leads to violence, he must choose between the two worlds he loves.