DC Super Hero Girls find themselves up against the Legion of Doom led by Lex Luthor who has gained possession of an ancient Kryptonian power that allows him to conquer and unite the world's Super-Villains. With the help of Kryptonian technology and a fortuitous wrong turn, DC Super Hero Girls must cross dimensions to rescue their fellow Super Heroes trapped in the Phantom Zone and gather allies in the Teen Titans to stop the Legion of Doom's takeover of Earth