Alex Keener has lived all of his sixteen years in Bunker 108. He's walked the same metal halls, seen the same faces, and has followed the same rules. All that changes when a viral outbreak forces him to flee the safety of his bunker.

Outside, he discovers a barren world twisted by the impact of the meteor Ragnarok thirty years ago. Alone, he must wander a brutal landscape, where every breath is a fight for survival. Monsters haunt the planet's surface, and nothing of the old world remains.

Can Alex survive this hellish wasteland, or will he become its newest victim?