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.

Atrocious serial killings on holidays in Gotham City send The World's Greatest Detective into action - confronting both organized crime and a unified front of classic DC Super-Villains - while attempting to stop the mysterious murderer.

An adopted 16-year-old with a mysterious illness learns her bio-tech billionaire parents are harvesting her blood for nefarious purposes.