The Anguilar are scavengers chased out of their own galaxy by an implacable enemy.
It took Charlie and his friends in the resistance two years to finally defeat them in a desperate gambit that was very nearly a suicide mission.
The threat from the Anguilar is gone, but the predators who chased them out of their galaxy have followed them here, looking for vengeance.
And the Zha'-Rath will wipe out anyone who gets in their way.