A mother and grandmother is brutally assaulted and murdered in her Salt Lake City Mormon bookstore. Her ties to wealthy Utah mogul Larry H. Miller have the public and the media in a panic. The cops investigate but soon, the case goes cold. Years later, something called Phenotyping becomes more available to the police and a diligent cold case cop named Ben Pender has a brilliant idea that will lead him on a quest with genealogists to find this monster.