Adapted from the Call of Cthulhu role-playing game supplement, The Fungi From Yuggoth by Keith Herber and published by Chaosium, Inc. A consultation in a Boston child-murder case leads Professor Nathaniel Ward and his adventurous colleague Charlie Tower into an investigation of a group called The Brotherhood of the Beast. They follow a trail which takes them across the world as they struggle valiantly to thwart the plans of a doomsday cult insidiously plotting the demise of mankind. Can the Brotherhood be stopped, or has an ancient prophecy accurately foretold the end of days?