Years ago, seventeen-year-old Apache hunter Lozen and her family lived in a world of haves and have-nots. There were the Ones-people so augmented with technology and genetic enhancements that they were barely human-and there was everyone else who served them.

Then the Cloud came, and everything changed. Tech stopped working. The world plunged back into a new steam age. The Ones' pets-genetically engineered monsters-turned on them and are now loose on the world.

Fate has given Lozen a unique set of survival skills and magical abilities that she uses to take down monsters for the Ones who have kidnapped her family. But with every monster she takes down, Lozen's powers grow, and she connects those powers to an ancient legend of her people. It soon becomes clear to Lozen that she is not just a hired gun.

As the legendary Killer of Enemies was in the ancient days of the Apache people, Lozen is meant to be a more than a hunter. Lozen is meant to be a hero.