Working with a single-minded tenacity, she sets out to prove it.Deputy Sheriff Ben Slater hides his personal pain behind the job, but Kate's arrival in his county knocks his world on its axis. He wants to believe her wild theory, but the idea of a serial killer with the kind of pathology she proposes is too bizarre.Together they work to find a killer whose roots began in a small town in Bigler County, but whose violence spread across the nation. A Janus-like killer, more monster than man, he fixates on Kate. The killer wants nothing more than to kill the "purple-eyed girl again."