When Ultraman gains an ultra-vision power enabling him to see into the parallel universe of Earth-1, he finds himself fascinated to discover that the super-beings on that world use their powers to stop crimes instead of committing them. The Crime Syndicate of America, fearing that they've grown rusty from a lack of suitable competition on their own world, decide to visit Earth-1 and lure the Justice League of America into trying to capture them. On Earth-1, the Syndicators begin a crime-wave across America, and the Justice Leaguers set out to stop their doppelgängers. The Flash stops the powerful Ultraman as he rips off a bank vault door in Central City. Batman stops Johnny Quick as he robs an art museum in Gotham City. Superman stops Power Ring as he robs the 3rd National Bank in another city. Wonder Woman stops Superwoman as she steals the plaster-coated gold statues from millionaire Jason Moreland's estate. Green Lanterns stops Owlman as he robs a jewel salon in Gotham City. As each of the Syndicators are defeated, they are transported to Earth-3 by saying the name Volthoom, according to Owlman's plan enacted by Power Ring. There, the Crime Syndicate defeats the Justice League. To break the tie, the Crime Syndicate decides to fight the Justice League on the neutral battleground of Earth-2, but plan to first defeat Earth-2's Justice Society of America. Meanwhile, the Justice Society discovers that the Justice League is trapped in its Secret Sanctuary on Earth-1, and learn all about the Crime Syndicate from them. When the Syndicators invade the Justice Society's Secret Sanctuary, the JSAers manage to defeat the Syndicators while avoiding contact with them, but are still transported to Earth-3 with the Crime Syndicate due to another prearranged plan of Owlman's enacted by Power Ring. After the Crime Syndicate imprisons the JSA, they shift the Justice League to Earth-2 and meet them in battle there. The Justice League manages to overcome the Crime Syndicate through teamwork and by using the Syndicators' powers against them. Discovering that the Justice Society is imprisoned on in a special prison on Earth-3 that is rigged to automatically destroy Earth-1 and Earth-2 if the JSA is ever freed, the JLA imprisons the Crime Syndicate in a green force-bubble in Limbo, the misty borderland between universes, placing signs around it in many languages warning everyone not to free the Syndicators. Thereafter the Justice League frees the Justice Society after channelling the destructive force to destroy only two dead worlds in outer space. Note: While comments made in the Crime Syndicate's later appearance in All-Star Squadron indicates that the team remained imprisoned in Limbo for the next few years, it is possible that occasionally the Syndicators managed to escape from time to time in untold stories. [“Crisis on Earth-Three,” Justice League of America #29 (August, 1964); “The Most Dangerous Earth of All,” Justice League of America #30 (September, 1964)]