"If you're reading this, I am not dead. I am so much worse than that."

In the ruins of a state once called California lies the city of Amaranth, where childbirth is impossible, disease is myth, and residents rely on the Lazarus Serum to survive.

When Claire Weston narrowly escapes an encounter with a mechanical man who is trying to kill her, she must travel to the future with Darius, a hardened refugee and the leader of the Octane Angels rebellion, to survive.

Unlike Claire, Darius is willing to do whatever it takes to survive—even if it means killing thousands for humanity's second chance. Together Darius and Claire fight their way to Amaranth to save the world, battling giant glass spiders and Amaranth's agents along the way.