Essun has inherited the phenomenal power of Alabaster Tenring. With it, she hopes to find her daughter Nassun and forge a world in which every outcast child can grow up safe. For Nassun, her mother's mastery of the Obelisk Gate comes too late. She has seen the evil of the world, and accepted what her mother will not admit: that sometimes what is corrupt cannot be cleansed, only destroyed. The conclusion to the post-apocalyptic trilogy that began with the Hugo Award-winning "The Fifth Season".