When an earthquake strikes downtown Denver, far from the nearest active fault system, the USGS dispatches Dr. Dayna Raines and an emergency response team to investigate. They discover that the epicenter corresponds to a decommissioned deep injection well once used by the U.S. Army to dispose of chemical weapons, which have eroded the earth and created the unstable cavern system responsible for the seismic activity.

Under 30,000 feet of water, the experimental exploration rig Leaguer has discovered an oil field larger than Saudi Arabia, with oil so sweet and pure, nations would go to war for the rights to it. But as the team starts drilling exploration well after exploration well in their race to claim the sweet crude, a deep rumbling beneath the ocean floor shakes them all to their core. Something has been living in the oil and it's about to give birth to the greatest threat humanity has ever seen.

This is the way the world ends. Not with a bang but a scream. In the remote mountains of Northern Alaska, Dr. Riley Middleton and her team of archeologists discover a burial site containing mummified remains dating to the last ice age. None of them notice the warning carved into the entrance or realize that the tomb had been deliberately sealed from the outside until they’ve already released a virus that turns ordinary people into murderous monsters. But there’s something even more terrifying inside...something ancient...something unspeakably evil.

On the last day of normality in Mackinaw, Illinois, Oliver McCallister thinks his worst problem is figuring out how to come clean to his wife about the secret he’s been keeping from her. Zoe McCallister thinks her worst problem is squeezing in an errand at the courthouse before another long day of nursing classes—and worrying about whatever Oliver is hiding from her.

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.