From publisher blurb: 1947. A weary world faces a new enemy -this time the invaders are already here, beneath our streets and homes! Ghouls of the Underworld details an ancient race bent on the destruction of humanity. One by one by one. The product includes rules for different types of Ghouls: the rank and file, the Revenants, and the ferocious Berserkers. Information on the Ghoul infestation of Chicago and the Lightning League's desperate attack on them is provided as well as notes on an ally the League had to accept: the Locarno Crime Syndicate!