A young hero must harness her singular powers to save the world in the conclusion to the New York Times–bestselling author’s Legacy of Dragons trilogy.

Ancient weapons of mass destruction lie hidden under the city of Pacta Servanda. Remnants of the Great Guilds and rebellious factions of the Empire want to seize those weapons and regain control of Dematr. Only Jason, brought by the first ship from Earth since the colony failed, might be able to disarm the threat. But he also might know how to employ the weapons for his own ends, making him a danger to all sides.

Standing between these threats is Kira of Dematr. But Kira, who somehow has both Mage powers and technical skills, is consumed by the mental conflicts caused by having both. As rogue Mechanics, Mages, and mercenaries attack with every weapon at their disposal, Kira suffers blackouts and begins to lose her mind. The fate of her world rests not only on her survival, but also her ability to control her unprecedented abilities.