Even as Joanna Watson searches for the missing actress, Pretty Penny, she is asked by Scotland Yard to join in the hunt for a vicious murderer whose method resembles that of Jack the Ripper. But in this fifth case (following The Art of Deception), as Joanna concludes that the killer has abducted the actress, she receives a letter indicating her young son Johnny will be the next to die. Time is running out, and Joanna has no choice but to devise a most dangerous plan which will protect her son, rescue Pretty Penny—and bring her face-to-face with the killer.