Case Computer Zodiac is the story of a group of people wrongly being sold a special computer that was instead supposed to be supplied to the police. Rick, Danielle, Nigel, Murray, Jennifer and Natasha are having dinner round Rick's apartment when Murray tells everyone that he knows who the Zodiac Killer was, this causes Rick to try and prove him wrong wrong. After logging onto the Internet they click on a series of pictures associated with the crime. The Case Computer they are using recognises the crime scene and throws them back to forty years into the past and they find that they are no longer researching the crime, they are now living in the time period. Can they stop the inevitable from happening? Or will they just let history take its course...Find out in this third gripping adventure in the Case Computer series.