When two Marines and their Corpsman reunite after a decade apart, they find themselves caught up in the mystery of their former squad leader's disappearance. With little more to go on than a handful of disturbing charcoal sketches and the whispers of a local legend, they plunge into the depths of one of America's last truly wild places.

But the trees themselves begin to whisper dark secrets. Secrets of trafficking and violence. Of rotten science and blood. Of something else that lurks in the shadows of the pines - something ancient, savage, and hungry.