In the dystopian, frozen Aruna, seventeen-year-old Alyona Krasnaya is a girl of machines, a cybernetic mechanic who survives under the thumb of her father's ruthless military regime by keeping her head down and her tools sharp. Her job? Fix what's broken. Hide what hurts. Never fall in love. Her world is steel, silence and rules she dares not break. But when she's assigned to help the Sovereign Order's deadliest assassin, something fractures. In him, Alyona sees not a machine, but instead a man. A dangerous connection forms, threatening to unravel everything she's been trained to believe. But in a world built to erase you, remembering who you are may be the most dangerous act of all. Now, with everything on the line. Alyona must decide; is she just another daughter of the regime, or the spark that will set it ablaze?