Trainee Tanming Guard Tang Xiaohe possesses a rare talent, able to enter the spiritual mansions attached to artifacts to investigate the memories left behind by the deceased. In the Tanming Office, she successively solved the tally theft case and the Shendu serial murder case, thereby drawing the dread of the overwhelmingly powerful senior grand secretary and being transferred to the Handu Registrar. Coinciding with the Jin envoy delegation entering the capital to pay tribute and secretly plotting evil arts by poisoning the famous wine Songgenchun with the intent to steal court heavyweight Genshi, Shi Meiyan's son Shi Kuiyi disguised himself to take risks in his father's stead, plunging into peril. Tang Xiaohe shuttles between reality and illusion, confronting the Jin conspiracy within shattered spiritual mansions and uncovering layer upon layer of dark secrets behind the imperial court and the frontier.