Wen Xin, a young vixen with a beautiful face skillfully painted by her master Xiao Wei, embarks on a quest to find her elusive master, who departed without a farewell. Her journey leads her to Ningcheng City, a place where humans and demons coexist, but she unexpectedly crosses paths with Dongfang Ling Feng, a thousand-year-old fox demon responsible for a string of gruesome killings through consuming human hearts. Through a twist of fate, Wen Xin finds herself mistakenly assuming the role of the young daughter-in-law to Jing Hange, the Chief of the Demon Catching Bureau. Amidst the chaos and complexities of their intertwined destinies, these two demons begin to unravel the depths of their own hearts and feelings.