To finance the search for her lost parents, 12-year-old Alannah Malarra uses her psychic powers to hunt demons. With the help of her "business associate," professional thief Wortley Flint, she snags ghouls and robs them of their illicit riches. Sure, it's a mercenary existence, but a girl's got to pay the rent. What Alannah doesn't realize is that the petty ghosts she's so good at snaring are just a small part of a big conflict, dating back centuries. The evil Gargoyle hordes from the Dark Dimension are at war with the army from on High, and only Alannah holds the key to victory!