It's been three years since the events of The Dark Knight Returns, and everything is just fine. At least on the surface. What the world at large doesn't know is that it's a total sham. A perfectly choreographed, pretty little world where everything that's ugly, or even potentially disturbing, is all nicely wrapped up with neat little ribbons and swept under the carpet.
Only he know better. He's watched it fester to near-breaking point, and it's time for the only free man left who can effect any real change to bring it all down around their ears, once and for all.