"There's a thousand scavengers in these woods."

Before being promoted to detective, Carrie Santero was given a rare glimpse into the mind of a killer. Through her mentor, Jacob Rein--a seasoned manhunter whose gift for plumbing the depths of madness nearly drove him over the brink--she was able to help capture one of the most depraved serial killers in the country. Now, the discovery of a small human foot buried in the Pennsylvania woods will lead her to a decades-old cold case--and the darkest secrets of her mentor's youth.

"Nobody trusts an animal that tries to eat its own kind."

Thirty years ago, a young girl went missing. A police officer was murdered. Another committed suicide. The lives of everyone involved would never be the same. For three agonizing decades, Jacob Rein has yearned for the truth. But when Detective Carrie Santero begins digging up new evidence, she discovers some answers come with shattering consequences.