The little vixen Wenxin has a beautiful face that was painted by her master Xiao Wei herself. In order to find her master who left without saying goodbye, she came to Ningcheng where humans and monsters coexist, but she encountered a series of heart-eating murders created by the thousand-year-old fox demon Dongfang Leaf.She was involved in a murder case and ended up being the daughter-in-law of Jing Hange, the executive director of the Monster Hunting Bureau.One person and two demons gradually realize their true hearts and feelings in the disputes and entanglements.