General William Tecumseh Sherman meets with Black Kettle and other Indian Chiefs, and Margaret watches another treaty being signed. Despite the treaty, Col George Armstrong Custer (Jonathan Scarfe) and the 7th Cavalry attack Black Kettle's Cheyenne village at the Battle of Washita River on November 27, 1868. Jacob Jr. has been serving as a scout for the U.S. Army with Custer. Margaret is taken captive with other Indian women. They are taken to an Army Fort, where she is reunited with her brother Jacob Jr., who tries to help her escape. She refuses, insisting on staying with her adopted Indian family. Eventually, the U.S. Army abandons some forts, and the second Treaty of Fort Laramie creates the Great Sioux reservation.