Wonder Woman and Aquaman are under attack by five of the Legion of Doom (Scarecrow, Riddler, Cheetah, Black Manata, Bizarro) in Black Manta's Manta-ship. Batman, Apache Chief, and Superman come to their aid, but they all disappear as the rest of the Justice League and Legion arrive. The missing members are teleported to a planet by a being called Vartu who places them in contests to end their battle once and for all. Batman and Riddler vie in a maze, with Batman winning. Black Manta and Aquaman must cross the Lake of Terror and Manta wins when Aquaman has to rescue him. Cheetah and Wonder Woman must climb a volcano and Wonder Woman wins. Apache Chief and Scarecrow must best a two-headed serpent and Scarecrow wins by being better with a lasso. Superman and Bizarro must stop a giant space robot with kryptonite beams and Superman wins. Vartu dumps the five Legion members into a pool of acid but the Justice Leaguers rescue them. While the missing members struggle against each other, the re