With the help of an ancient Kryptonian power, Lex Luthor unites the world’s Super-Villains to capture all of Earth's Super Heroes, until…only the DC Super Hero Girls are left to stop the Legion of Doom. Our heroes must cross dimensions to rescue their fellow Super Heroes from the Phantom Zone, but a fortuitous wrong turn leads them to Titans Tower – where they find much-needed allies in the Teen Titans!