From the introduction: So decadent are the vampire lords of Nephilidia that they fear equally the sun, the sea, dry land, and, indeed any surface not hewn by an intelligent hand. Distinguishable from ordinary vampires by the gills on their necks and their glassy blue eyes, they prefer to travel via subterranean aqueducts, sewers, or other shallow, watertight, artificial constructions. User summary: The 23-page scenario is distributed with a 38-page "Random Treasure Table".