Victor Rarlo is a sadist who loves puzzles and lets people perish in his fiendish mazes. Being challenged by a strange mystic, Rarlo travels into psychedelic mind-mazes and gets irreversibly caught in the maze of his own mind.
"When civilization began its march into the mechanical age late in the 19th century, the Paris exposition became the center of world attention..." A horror amusement ride is built, creating the world of Hades. Testing it, the park directors go mad.
"One of the most macabre tales to come from the moors of Scotland, took place fifty-six years ago..." A London police inspector doesn't believe the reports of a werewolf on the rampage on the moors and gets to be the monster's next victim.