In the DCU, there is another Earth where life is reversed. The human heart is on the right side, and morality is switched around. Supervillains such as Lex Luthor and Slade Wilson are some of this world's greatest heroes. But on the other end of the spectrum, there is the Crime Syndicate. Made up of Evil Counterparts of the Justice League, they run an empire of organized, superpowered crime that has all but taken over the world. Lex Luthor, in a desperate attempt to stop them, crosses over to the mainstream DC Universe to ask the League for help. While the League agrees, they're facing off against a world overflowing with supervillains, and Owlman (Batman's Evil Counterpart) has his own deadly agenda...