The story revolves around a passionate detective fan who starts investigating criminal cases herself. It turns out that a simple housewife possesses unique deductive abilities. Yu Sor-ok has always wanted to be a detective, but had to give up her dreams of working in a detective agency after getting married. Her husband, Sor-ok, is a prosecutor. But it's not easy to give up on one's calling. One day, fate brings the main character together with a young investigator, and her life changes dramatically...