Somewhere, supposedly, sits the Shadow Sorcelled Key. An artifact desired by one of Sigil's most powerful, and evil, persons. Oh, and you just happen to be working for her. Delve into Sigil's murky past and underneath its streets into the darkness of the Great Below, searching for something that may not exist, but is very much desired by your employer. As it's always been said: 'Beware of Fiends Bearing Gifts.' But what of Fiends -Desiring- them?