In the magical continent shrouded in the "fog of oblivion", the sixteen-year-old girl Ellaria is the last "Stardust Weaver" - her fingertips can pull out the silver thread in the starry sky and weave short-lived illusions of reality. However, due to an accident, she was framed as a "fog-inducer" and imprisoned in the empire's strictest obsidian prison.
Deep in the prison, she meets the silent prisoner Karen. This man wore iron shackles that imprisoned magic, and his back was engraved with ancient runes burned by flames. However, when she weaved the illusion, the silver threads of stardust condensed into reality. He said that he was the "Ashbringer" and was once the chief protector of the royal family. However, because he refused to sacrifice a human being to the "Mist Core", he was deprived of his magic power and thrown into the abyss.