A tremendous force has knocked out all the computer systems on Tangent Earth, and New Atlantis—its most technological city—is left totally helpless. The JLA has sent the Teen Titans, Rip Hunter and Chemo to deal with the chief suspects: the Joker and the Atom.
Madame Xanadu, Mary Marvel and Lori Lemaris all masquerade as the Joker in the rebuilt city of New Atlantis.
— Description from Comic Vine community (comicvine.gamespot.com).
