In the seventh year of Yonghui, Su Jinyun, the daughter of the judge of Dali Temple in Chang'an, offended the powerful by solving the "case of hanging corpses in the lantern tower during the Lantern Festival" and was faked to hang herself. When blood filled her eyes, she was shocked to realize that she had returned to three days before the crime. She used her memory to avoid death and testify against the real culprit, but she saw that the case was fissuring like a cobweb - with each rebirth, the identity of the deceased and the traces of the murderer quietly changed, and even the secrets of the late emperor's edict and the sorcery of the Western Regions were revealed. When she caught the murderer's clothes in her seventh reincarnation, she discovered that the brocade embroidered with lotus flowers was exactly the same as her wedding dress. Is reincarnation an opportunity to change one's destiny against the will of heaven, or is it a prisoner of a deeper conspiracy? Under the shadow of Chang'an night, she must tear apart the truth that has been repeatedly covered up in the chains of fate.