Sometime after the Invasion of Ziost, the Eternal Empire of Emperor Valkorion enters into the Galactic War between the Galactic Republic and the Sith Empire, and led by its new emperor, Arcann, the Eternal Empire decimates both the Republic and the Sith. Players awake from carbonite five years after the galaxy has fallen to the Eternal Empire, with the Republic and the Sith Empire having all but collapsed, and must gather new and old companions and take the fight to the Eternal Empire as an "Outlander."