Wang Sheng (Kun Shen) leads an assault on a bandit hideout, during which he rescues Xiaowei (Xun Zhou), who is revealed to be a fox spirit requiring human hearts to maintain her youthful appearance. Wang brings Xiaowei home and introduces her to his wife, Pei Rong (Vicky Zhao), who graciously accepts her and offers her assistance. However, Xiaowei develops feelings for Wang. Following this, unusual occurrences beg…