Ten years has passed since an infectious virus nearly consumed all of mankind. Millions died, millions more became infected, changed, and turned into mindless, feral hunters bent on the consumption of living flesh. Archer was a solitary man, scavenging what he could to survive off the ruins of the world that no longer existed. A world gone mad, where those who still lived were just as great of threat as those who were infected. 

Hundreds of feet beneath the ocean's surface, a graveyard waits. Years ago, the SS Arcadia vanished without a trace during a routine voyage. Though a strange, garbled emergency message was broadcast, neither the ship nor any of its crew could be found. Sixty years later, its wreck has finally been discovered more than three hundred miles from its intended course: a silent graveyard deep beneath the ocean's surface, eagerly waiting for the first sign of life.

22-year-old Eileen goes missing while hiking in the remote Ashlough Forest. Five days later, her camera is discovered washed downriver, containing bizarre photos taken after her disappearance. Chris wants to believe Eileen is still alive. When the police search is abandoned, he and four of his friends create their own search party to scour the mountain range. As they stray further into the dark forest and the unsettling discoveries mount, they begin to believe they’re not alone in the trees and that Eileen’s disappearance wasn’t an accident.

In 1939, a secret airship departed Nazi Germany in the dark of night filled with some of the most influential people of its time. Its cargo: a complement of rich Jewish families carrying their most valuable possessions. One such item among them was as dangerous as it was priceless. The airship never reached its destination. In 2015, Sam Reilly, a marine biologist and wealthy son of shipping mogul James Reilly, discovers a missing clue about the lost airship, and what follows is a violent treasure hunt.

Something lurks in the darkness of the trees. A group of friends goes on a hike in search of an ancient spring deep inside the forest. Mythical stories come from the woods—tales of gnomes, fairies, and other not so benevolent creatures. Everything changes for the group when they run into a hiker that mysteriously vanished in the area weeks ago. She is malnourished, dehydrated, and hurt, but she keeps raving about the danger in the woods, repeating one incoherent word over and over in a foreign language.