You are cordially invited to an exclusive party shrouded in mystery and decadence. There is no guest list, and no address for the countryside mansion. Its guests are chosen by hand and know how to find their way. It's a party where fantasy and reality blur into a night of pleasure and terror alike where guests mingle and swap partners among the most racy of fetish costumes and monstrous beings roam the halls. It's in this party that a group of friends will find the night turned from a strange party to a game with fear in those dark halls where things that shouldn't exist roam. There's more to this costumed Halloween party than meets the eye. Discovering the truth may change their lives, if they can.