Colorado, 1864. Star, a young survivor of the Sand Creek Massacre, is brought to the Fort Marion prison castle, where he is forced to learn English and practice Christianity by Richard Henry Pratt, an evangelical prison guard who will go on to found the Carlisle Indian Industrial School, an institution dedicated to the eradication of Native history, culture and identity. A generation later, Star’s son, Charles, is sent to the school, where he is brutalized by the man who was once his father’s jailer. Under Pratt’s harsh treatment, Charles clings to moments he shares with a young fellow student, Opal Viola, as the two envision a future away from the institutional violence that follows their bloodlines.