In this previously untold JLA/JSA crossover story, the heroes of three worlds try to to defeat the mystical threat of three evil rulers of fantasy dimensions — Lorelei of Fairyland, Troll King of Magic Land, and the Incubus of the Land of the Nightshades. But why can’t anyone recall this case? Featuring the Justice Society of America and the Justice League of America! Guest starring the Sentinels of Justice of Earth-Four — Blue Beetle, the Peacemaker, Son of Vulcan, Captain Atom, Nightshade, and the Question — and introducing Tyger and the nuclear villain Major Force!