After crossing over, Tang Yu married Xie Qiutong, the sixth daughter of the Xie family, in order to protect himself. To his surprise, he discovered that she was known as the "Number One Female Demon of the Eastern Jin," with a history of murdering multiple husbands. At the same time, other forces, such as the demoness Xi'er from the Palace of Eternal Bliss, also set their sights on Tang Yu—all because of a treasure map.