A serial killer who enjoys performing medical experiments is finishing up his most elaborate effort yet in rural Louisiana. He is known as "The Butcher" in the media, and he has evaded capture thus far. Dr. Wren Muller, a forensic pathologist, is the greatest there is because of her extensive understanding of humanity's most evil minds and her years of experience examining their victims. She is more determined to bring the Butcher to justice the longer his murdering spree lasts. And still he keeps evading her. Wren's fixation develops as bodies pile up one after another on her examination table. There is increasing pressure to stop the slaughter. And her adversary grows bolder. What lengths will Wren go to an order to expose the Butcher?