Ma Yi-Deum has worked as a prosecutor for 7 years. She sometimes resorts to drastic methods to win cases. One day, Ma Yi-Deum is transferred to a special division dealing only with sex crimes.
Ma Yi Deum, a materialistic female prosecutor who does not hesitate to use personal attacks, fabricate evidence, and incite perjury in order to win her case is assigned to a special task force for sex crimes. Yeo Jin Wook, a newbie prosecutor also joins the task force, and together they solve crimes with a grudging chemistry.