Using demon blood as ink and the Compendium of a Hundred Demons as her scroll, she can paint their forms and seize their powers. Jiang Yuechu wakes one morning transformed into a young girl in the golden age of the Tang Dynasty. Beneath the moon of Chang'an, splendor and decay coexist; immortals and Buddhas have vanished, and demons run rampant. Fortunately, slaying creatures increases her cultivation, and by painting each demon into her compendium, she turns them into her own strength. Jiang Yuechu embarks on a path of slaying demons and seizing their powers, suppressing the demons of all ages with her peerless beauty, and gradually unveiling the mysteries of this world.