In the conclusion of a two-part story, medieval villains Morgaine and Mordred summon an army of the "undead" to vanquish the Justice League and to help them get their hands on the Philosopher's Stone. The villains' ultimate goal is to restore England to its ancient splendor, with themselves as absolute ruler. With the assistance of the quasi-demonic Etrigan, the Leaguers are determined to stop Morgain and Mordred in their tracks -- but they may have to do without the assistance of J'onn J'onnz, who is poised to go over to the enemy side in exchange for a reunion with his long-lost Martian loved ones. ~ Rovi