The son of an aristocratic family Wang Yuanfeng is not interested in wealth or romance but is obsessed with solving cases. After he accidentally saves the kind-hearted and naive fox spirit, Xiao Cui, she marries him to pay the debt of gratitude. Yuanfeng, however, stays away from her while Xiao Cui continuously makes trouble for him. When Yuan Feng later becomes county magistrate, she helps him with his investigations.