In the wake of the Civil War, American settlers and soldiers flood into the Great Plains, seizing Native American land as they go. But the Lakota leader, Sitting Bull, alongside renowned warrior, Crazy Horse, organizes an unprecedented resistance movement to fight back against the encroaching US Army.

Sitting Bull and Crazy Horse face George Armstrong Custer and the Seventh Cavalry in the most famous battle of the American West at Little Bighorn. When their legendary triumph over the US Army fails to end the war--they must continue the fight to preserve the Lakota way of life against unimaginable odds.