What do you think of when you think of prosecutors? Upright, serious, and taciturn. But these words are not applicable to Ma Huili (Kim So-yeon). Ma Huili, who has a strong memory, likes bright and beautiful clothes and shoes, and yearns for the fashion industry. But she was born in a famous family and her life was planned early on. Under the arrangement of her parents, she embarked on the path of prosecutors. But Huili knew nothing about what justice is and why she should be a prosecutor. Huili, who has no enthusiasm for prosecutors, has solved one case after another by accident. The driving force behind this is Xu Yuren (Park Shi-hoo), who is a lawyer. Xu Yuren can be said to be around Huili 24 hours a day, and he helps Huili in time for her troubles. The reason behind this involves the matter between Yuren's father and Huili's father 20 years ago. The grievances of the fathers made Yuren wander between ice and fire. Yuren gradually deviated from the original purpose of approaching Huili, and Huili, who was unaware of it, unexpectedly invested in this love, but she didn't know that the truth was slowly approaching her...