Paha Sapa, 'Black Hills', is a Red Indian shaman who as a young boy at the Battle of Little Bighorn takes the ghost of the dying General Custer into his own body. Sixty years later as an old man working as a dynamiter on Mount Rushmore, he plots to blow it up.
Meanwhile, Custer finds himself trapped in a strange, dark place and begins to write sensuous, heartbreaking missives to his beloved wife. Thus begins an intricate narrative that sweeps across decades of American history, building up a portrait of one country's relentless expansion and what was lost and destroyed in its path.