An ex-cop who cannot die. A moon full of settlers who cannot thrive. Mahina's terraformers built a high-tech urban paradise. Then Earth flooded the colony with desperate refugees, cop Sass Collier among them. The settlers who arrived with Sass died decades ago. Outside the citadel, their descendants die weak and young. Sass fought a rebellion against the city once. She won concessions to give the settlers a chance at health...