After being thrown into a portal by Dark Surfer, a powerless Iron Man finds himself stranded on a world of monsters. There he meets Man-Thing and Werewolf by Night and battle Dracula and a gang of mummies led by N'Kantu, the Living Mummy. Later, it is revealed that Werewolf’s girlfriend Ellen was turned into a vampire prior to their arrival. As Iron Man tries to figure out how to leave to battle Dark Surfer, the trio of monsters declare they will form the “Supernatural Hero Squad” to save innocents on their world.
