On the day after Thanksgiving in 1868, George Custer's 7th Cavalry attacks a Cheyenne village. Amidst the slaughter, the soldiers discover a white woman, Eden Murdoch, presumed dead but apparently living with the tribe. She refuses to acknowledge her "rescue" from a "savage" society. Eden and Custer's aide-de-camp, Captain Brad Randall, unexpectedly set in motion events that echo all the way to Little Big Horn.