Earth is decimated after intergalactic tyrant Darkseid has devastated the Justice League in a poorly executed war by the DC Super Heroes. Now the remaining bastions of good – the Justice League, Teen Titans, Suicide Squad and assorted others – must regroup, strategize and take the war to Darkseid in order to save the planet and its surviving inhabitants.

When innocent civilians begin committing unthinkable crimes across Metropolis, Gotham City and beyond, Batman must call upon mystical counterparts to eradicate this demonic threat to the planet; enter Justice League Dark. This team of Dark Arts specialists must unravel the mystery of Earth's supernatural plague and contend with the rising, powerful villainous forces behind the siege—before it's too late for all of mankind.

John Constantine returns as revenge seeking demons begin to breach the physical barrier, United with Zatanna, Deadman and Jason Blood, Constantine must defeat the demons from his past and protect the Earth from a hellish demise.