Joanna and the Watsons are called in by the Whitechapel Playhouse to find Pretty Penny, a young actress who has gone missing. While on their search, the trio is asked by Scotland Yard to join in the hunt for a vicious murderer whose method resembles that of Jack The Ripper. It soon becomes clear that The Ripper has reemerged after a 28-year absence and is once again murdering young prostitutes in Whitechapel. As Joanna moves closer to learning his true identity, the killer sends her a letter indicating her young son Johnny will be the next victim to die. -- adapted from jacket