Jeremiah Johnson

Mexican War veteran Jeremiah Johnson takes up the life of a mountain man, supporting himself in the Rocky Mountains as a trapper. Johnson adopts a boy from a cabin whose inhabitants were apparently attacked by Blackfoot warriors, leaving only a woman and her uncommunicative son alive. Johnson is pressed by a troop of U.S. Army Cavalry to lead a search party to save a stranded wagon train of settlers. Johnson sets off after the warriors who killed his family and attacks them, killing all but one.