Peridot is headed for its second cataclysm. War has broken ancient alliances, sealed borders, and locked down the skies. The Five, Peridot's alchemist gods, have seen one of their number die and another fall in their efforts to protect their world from invaders beyond the stars. Defeated and diminished, they have ceased to answer the prayers of their people and have left the rapidly unraveling world to fend for itself.

Talis and the orphaned crew of the lost airship Wind Sabre have a plan to set things to rights, but they're stranded on a rock far from the heart of the conflict. When an old enemy comes and offers them a ship and a path forward, it comes with strings that will pull them further from the home they are so desperate to save.

Can Talis and her crew chart a course through hostile skies, shifting allegiances, and subverted governments before the true enemies of Peridot claim a power that can destroy the world once and for all?