Los Angeles police officer Lieutenant David Grey encounters a brutal murder. When he tracks down a possible lead he encounters strange, goblin-like men who attack him. When he awakes, Grey finds himself in a hospital, and those around him have become translucent and can no longer see him. It is explained to him by his mysterious guide Laurel that he has lost his soul and he has now been plunged into a shadow world that runs parallel to our own, filled with people who were forgotten by the world and "fell through the cracks."