Private investigator John Van Ark takes on what could be a lucrative case, finding the missing son of a well-to-do couple. By entering their hidden world, he discovers secrets that lead to immortal monsters who play with humans for fun, often torturing them with medieval devices thought lost to history. In his investigation, he will cross paths with cursed musicians, spirits of the dead, and the possible truth behind the untimely deaths of members of the "Twenty-Seven Club."