Eight years ago David Beck was knocked unconscious and left for dead, and his wife Elizabeth was kidnapped and murdered. For the next eight years Dr Beck re-lived the horror of what happened that day every day of his life. Then one afternoon, he receives an anonymous e-mail telling him to log on to a certain web-site at a certain time, using a code that only he and his wife knew. The screen opens on to a web cam - and it is Elizabeth's image he sees. Is it a practical joke? But as Beck tries to ...