16-year-old diabetic, Ruby MacGregor, is the most conscientious, considerate and level-headed teenager in Edinburgh... until she decides to experiment with illegal substances, steal her best friend's boyfriend and start an on-line relationship with a guy eight years her senior. Cyber-friend, Stefan convinces her to pose for him on her webcam. There's also the distinct possibility he might be a serial killer who targets teenaged girls. Ruby becomes convinced of this after suffering nightmares featuring two young girls, Levi and Cody, who have possibly been abducted then murdered. Who are they?...