Lance Delano, a ruthless millionaire businessman loses everything in the dotcom crash, except for an interest in a small, cash strapped oilwell drilling company owned by Montana wildcatter Jeff Bishop, who has just discovered a vast new oilfield in the Canadian wilderness. Delano leaves Bishop in the wilds to freeze to death in order to steal his company.
Black Dog Running, a member of a lost tribe of Indians living high in the Rocky Mountains finds Bishop unconscious and near death and takes him back to his people where, suffering memory loss, Bishop is eventually inducted into the tribe. Helen Coffey, a Salt Lake City corporate public relations officer, is fired from her job for criticizing corporate environmental vandalism. She joins the Sierra Club as an activist, determined to stop exploitation and degradation of Indian reservations by big business.
Bishop regains his memory and escapes from the tribe to hunt down Delano. He is pursued by Black Dog Running who has been ordered to kill Bishop to prevent the outside world from learning of the existence of the lost tribe. Delano plans to drill in Great Spirit Valley, a sacred Indian site in Montana. It is there that Delano, Bishop, Black Dog Running and Helen Coffey ultimately collide: Bishop seeking retribution, Delano desperately trying to escape the wrath of the Indian nations opposing oil exploration, Black Dog Running reluctant to kill the white man who once was his friend and Helen Coffey determined to halt Big Oil's insatiable greed.