Sun Woong gets a surprise visit from his son Jae Hoon. It turns out that Jae Hoon is in trouble for bullying a classmate. Meanwhile, Myung Ju works on a school violence case in which a middle-school girl jumped from her school building after being bullied. Sun Woong deals with uncomfortable conversations at work and is unsure of what he should do about his son.

Promotion season is officially here, and the prosecutors of the Jinyeong Branch are being extra cautious not to stir things up. However, Jung Woo breaks the peace, making Min Ho anxious. To make things worse, the notorious Mr. Hwang, also known as the Ax, is back to torment the prosecutors of Jinyeong.