Using the blood of demons as ink and the Hundred Demons Manual as the scroll, one can depict their forms and seize their supernatural powers. One morning, Jiang Yuechu woke up to find herself transformed into a young girl in the prosperous Tang Dynasty. Under the moonlight of Chang’an, splendor and decay coexist, immortals and Buddhas have vanished, and demons roam freely. Fortunately, slaying creatures can increase one's Dao cultivation, and by painting the demons into the Demons Manual one by one, their powers become her own. From the domineering sword techniques of the Tiger Mountain God to the piercing scrutiny of the Blue-Faced Wolf Lord. From the water-controlling ability of the White Flood Dragon to the tremendous strength of the Black Mountain Bear Lord! Occasionally, Jiang Yuechu would also be troubled, wondering why her supernatural powers were increasing more and more.