With Superman freed from his New Apokolips prison, the classic Trinity lineup is back together and ready to rock their next gig. Wonder Woman, Batman, and Superman amp up their power to launch an assault on Castle Bat, and that's just the warm-up act! Three walking nightmares are hidden deep inside the fortress — but these Dark Multiverse versions of the Anti-Monitor, Superboy Prime, and Darkseid hold the key to humanity's survival. The Justice League have to face down their old nemeses, but will round two be the end for our heroes?