In a small grim room, the body of a woman is discovered, panic and pain etched in her face. The scene matches in every detail a series of murders two years ago-murders that ended when irrefutable forensic evidence secured the conviction of a deeply disturbed young man named Derek Tyler.

But there's no way Tyler could have killed the latest victim. He's been locked up in a mental institution since his trial, barely speaking a word. So is there a copycat?