Ten years ago, vampiric beasts called Hellions invaded the city of Westraven and decimated it with fangs, claws, and cannon-fire. Now, survivors live underground and sustain themselves with the scraps left behind, often under the cruel fist of self-made leaders and grounded sky-pirates. Living under such rule is Claire, a talented young engineer working only to ensure e a life for her sister, Abigail. When Abby is kidnapped by the Hellions, Claire becomes desperate and finds herself allying with marauders– hot-tempered pirates equally as dangerous as the Hellions themselves.
As Claire forges a shaky relationship with them and their cynical young captain, she unearths truths about her past she could never have imagined, and realizes that the only way to protect those she loves is by challenging the Hellions head-on, an endeavour that could see the end of the Hellions once and for all, or secure their reign once and for all...