Ma Yi Deum is a competent prosecutor who gets her job done. One day, she witnesses her superior harassing a news reporter. In return for personnel appointment, Yi Deum gets offered a case. However, things start going south when Yi Deum meets a newly appointed prosecutor, Yeo Jin Wook.

Yi Deum gets appointed to the most unwanted department of all, Crimes Against Girls Unit. There, she reunites with Jin Wook. Furthermore, the two become tenant and landlord which gives Yi Deum even more of a headache. Together, they become in charge of an attempted rape case.