3 villains each from Earth-1 and Earth-2 hatch a plot to commit crimes, then hide out on the other Earth. To ensure their success, the villains of Earth-1 mystically trap the Justice League of America in their headquarters. But the Justice League of America summons the Justice Society of America and switches places with them.; The Justice League of America and Justice Society of America fight their own villains on the opposite Earths until they are mystically transported to cages in space. They escape and take down the gathered villains.; The Spectre meets a foe who is as powerful as himself and works feverishly to overpower him before he can harm Clarice.; The Vigilante and Stuff stop three criminals from looting the Great Western Exposition.; Wildcat thwarts the Huntress's attempts to kidnap two boxers to prevent the heavyweight title match, whose proceeds were to go to charity.; Johnny Quick covers for 99 convicts while they prove their innocence.