Oklahoma Land Rush begins by recounting the historical treaties signed in 1866 between the five civilized tribes and the United States, which promised land rights to Native Americans. The episode paints a vivid picture of the growing unrest as white settlers, fueled by greed and ambition, seek to claim the rich lands of Oklahoma. Central to this conflict is E.C. Boudinot, a Cherokee leader who controversially proposes selling parts of tribal land to white settlers, igniting fierce debates within the Native American community and among Congress members.