George Alwood III, is a spoiled and rich young man who heads west to become a mountain man in 1825. Taken under wing by two experienced old mountain men, George Alwood the third becomes Bear Killer the mountain man.

After his wife and unborn child are killed by white men, the young mountain man makes a promise to avenge their deaths and he’s swept up into a deep sense of rage. He finds, however, the men he is searching for are hard men to pin down and even harder to kill.