After the apparent disappearance of the Justice League during a battle against Pariah and his Dark Army, a new generation of heroes must protect Earth on their own. Nightwing, Jon Kent, and their allies attempt to organize a new resistance as Deathstroke launches an offensive against superheroes. But behind these attacks lies a far greater plan: Pariah seeks to harness the Great Darkness to reshape the Multiverse. As parallel worlds come under threat and the veteran heroes appear lost, their successors must overcome their differences and defend the Justice League's legacy against a crisis that could transform every reality.