In a city forever in darkness, an ancient horror awakens.
Explorer Bruce Wayne accidentally unleashes an ancient evil, and returns to Gotham after being away for two decades. There, Batman battles Lovecraftian supernatural forces and encounters allies and enemies such as Green Arrow, Ra's al Ghul, Mr. Freeze, Killer Croc, Two-Face and James Gordon.
superhero
cult
based on comic
mad doctor
demon
supernatural creature
explorer
masked vigilante
masked superhero
ancient evil
magic book