The calm and rational prosecutor Xu Rulin reunites his former apprentice Luo Xun during a trial. Luo Xun, who is already a lawyer, faces his master in a tit-for-tat way and becomes a pair of enemies who know themselves and their enemies.

Three years ago, Luo Xun left the procuratorate due to an old case.She returns again with a clear goal: to defeat Xu Rulin.Xu Rulin took the call calmly, and the two fought repeatedly.

As they met again, Luo Xun gradually realized Xu Rulin's good intentions. The spikes of the two confrontation were softened and the misunderstanding gradually melted.Xu Rulin saw Luo Xun's growth and was warmed by her light. The two healed each other and changed each other. In different camps, they jointly protected the justice in their hearts.