After Praimfaya burned the world to ash, a Nightblood Grounder named Y/N was left behind on Earth—completely alone. Years passed in silence. The dead world became their home. Survival became routine. And in that emptiness, Y/N found something unexpected: a Nightblood child to protect. But everything changes when the sky opens again. Survivors return to Earth, including Bellamy Blake and Octavia Blake—people from a past Y/N barely remembers, but who now stand in the ruins of their present. As old alliances resurface and new conflicts ignite, Y/N must decide whether to remain alone in the ashes… or risk trusting the people who came back to a world they no longer recognize.