Kevin Costner is Lt. John Dunbar who, as a reward for an act of heroism, chooses reassignment to the Western Frontier. Dunbar becomes caught between two worlds as he is drawn into the loving and honorable folds of a Sioux tribe living in the Dakota territory. This powerful story follows Dunbar's romances and friendships with an extraordinary race of people, and ultimately, the crucial decision he must make as white settlers continue their violent and ruthless journey into the lands of the Native Americans.