John Charters becomes ill and takes on the characteristics of a bat, developing cannibalistic and vampiric features, while being eternally parted between his once human nature and his present animal condition. This tale of metamorphosis mixes Kafkaesque elements with the typical pulp fundamentals that would, later on, inspire the atmosphere and the characteristics of one of the most iconic "bat-inspired" comic book character of all time. Also in the book a restored version of "The Case of the Missing Heir" the very first Bob Kane's dark comic book story in the style that would make Batman a lasting success