A thousand years ago, Qingheng, the Nine-Tailed Celestial Fox and Empress of Qingqiu, suffered a heavenly tribulation. Her eight spiritual tails scattered into the mortal realm, and with them her memories shattered and her six senses were completely lost. To retrieve her spiritual tails and uncover the truth of that year, she assumed an alias in the mortal realm and founded the Qintian Bureau, operating under the rule of exchanging a single precious treasure for a single truth, dedicated to cracking bizarre cases and mazes between the imperial court and the six realms. In the course of handling cases, Qingheng gradually regains her tears, sense of taste, and emotional fluctuations from being a monster devoid of feelings and cold and aloof. Accompanied by Queyu the skylark, Xuanchen, a Taoist priest from Sanqing Temple, becomes her bodyguard due to a bet, following her all the way.