A young Jim Bridger joins William Ashley’s trapping expedition hoping that the untamed West will bring fortune and adventure. With a photographic memory, Jim quickly catches the attention of seasoned explorers. But when a rescue mission leaves fellow trapper and hunter Hugh Glass fighting for his life after a vicious grizzly bear attack, Jim Bridger’s morality is put to the test. As the hostile Arikara warriors close in, Bridger must decide between staying by the side of a dying man or fleeing to safety, and his decision will eventually come back to haunt him.