In the TV series "Under the Moonlight," after her family's downfall, Luo Shu, known for her ability to understand people's hearts, assists County Magistrate Han Mushi in solving major cases, earning the nickname "Jinnang." Disguised as a detective, she works with Qi Menglin, a wanderlust-driven young man, to solve bizarre cases like the "Headless Corpse Case" and others, while gradually developing feelings for him. As they seek justice for wronged women, they uncover a larger conspiracy.