Ma Hye Ri is a woman who possesses an exceptional memory as well as the capacity to focus, both of which contributed to her successful completion of the bar examination. She is far from being an ideal prosecutor since, despite her talents, she is more interested in being trendy and she dislikes hard work; therefore, she is not suitable for her profession and she has questions about her suitability for it. However, during the course of her battles with challenging cases and disagreements with more senior colleagues, Hye Ri eventually develops into a great prosecutor with a strong sense of both duty and justice.