The order and chaos fracture, unleashing the Upside Down Man. Zatanna and Diana aim to strengthen the Justice League Dark after Andrew Bennett's death. Botson Brandt is summoned by Rama Kushna. Blue Devil confronts Bobo about his neglect of Myrra. Xanadu learns of Mordru's arrival, Arion warns of impending danger. Diana and Zatanna search for Mordru, interrogate Faust and Papa Midnite. Circe reveals that magic is collapsing. Mordru transforms Zatanna and Diana into Lords of Chaos. Khalid explains Nabu's plan to restructure magic to thwart the Upside Down Man. The Lords of Order attack Myrra. Diana and Zatanna transfer Chaos powers, defeat the Lords, but consequences are dire. Xanadu sacrifices herself to eliminate Mordru, allowing Myrra's evacuation.
The film concludes with the team once again in mourning, providing refuge to Myrra's inhabitants in Gemworld, and Hecate's mark appearing on Diana's forehead.
Post-credits scene: The barrier preventing the Upside Down Man from reaching our world is now shattered.
