But this "London" is a crime-free virtual city, a historical theme park for tourists. Qualified witch Roberta Morgenstern and her fresh-out-of-the-police-academy assistant, Clement Martineau, set out to solve the murder.

A wild chase through the streets of old London brings the heroes face-to-face with the terrifying new Ripper. But then they realize their true quarry is the man behind the monster: the mastermind who is bringing some of history's most notorious villains back to life. The trail of evidence leads them from the Versailles of Louis XIV through Renaissance Venice to Montezuma's Mexico, where they have a date with the devil himself....