Hong Kong is a place full of legal system, but can the current law maintain justice? Based on the background of the stories of thirteen cases, this TV series tells the great impact of the Hong Kong system on different people. Prosecutor Yu Zaichun is a newcomer. He hates evil, distinguishes right from wrong, and has a full sense of justice. However, he is a little irritable and impulsive when handling cases. His boss, Ding Rou, teaches everyone patiently. Yu Zaichun treats Ding Rou very well. She has a crush on Yu Zaichun, but Ding Rou ignores Yu Zaichun because she likes the family lawyer Li Guozhu, and Yu Zaichun's friend Jiang Chengyu has a very strong family background. The three of them worked together to solve many difficult cases. Zhou Wenbin is secretly in love with Jiang Chengyu, but he still can't deal with his relationship problems. The intern Fang Jiaqi has been secretly in love with Yu Zaichun. After he failed, he fell into a love triangle with another barrister instead. What will happen with all kinds of emotional conflicts?