Fourteen-year-old Luna lives a quiet, sunlit life in Sonder - a self-sustaining solarpunk city tucked deep in a lush, protecte valley. Her days revolve around community meals, open-source maker labs, and the balance of give-and-take tracked through a city-wide app. But everything changes the day she and her friends discover a long-buried relic from the old resource wars: a deactivated, military-grade robot. When a State Inspector arrives to claim it, Luna is forced to question everything she thought she understood about her home - and the peace it promises. As they uncover the robot's history, Luna and her friends find themselves tangled in secrets that stretch far beyond their valley - and caught between the comfort of community and the cost of freedom.