简要：PG-13 is an endless army of shadow demons, determined to destroy all reality, flocking to our world and all parallel Earths. The only opposition to them is the most powerful team of metahumans in history. But even the combined strength of Superman, Batman, Wonder Woman, Green Lantern, and all their superhero companions cannot slow down the attack of this invincible tribe. What mysterious force is driving them? How did the long buried secrets of the class monitor and super girls threaten our final defense?
