Liu Lang (Chen Bolin), a talented and handsome lawyer, is about to be promoted. The sudden appearance of Liu Liangliang (Lin Geyu), a cute and adorable kid, throws his originally free and easy life into chaos. In his career, he is forced to form a rival partnership with new lawyer Lin Xiaoyan (Guo Xuefu) and fight side by side with lawyers of different personalities in the law firm. One exciting case after another, one high-energy defense after another, they explore the true meaning of justice together in the chaotic daily life.