Popular heroes and their hand-picked assistants (mostly in contemporary forms) from literature and film (ranging from bestselling children's books to world-wide film franchises) are thrown together in a sleepover at a haunted mansion and must survive the night by banding together and relying on their combined wits and skill. The heroes soon realize that they are trapped in a parallel world of popular fiction when they are visited periodically throughout the night by other famous characters, and are besot by many familiar clichés from their own stories... fanfiction/multiple-crossovers/comedy