Saheonbu threatens to resign all its members unless right to investigate the murder case involving Prince Yeoning is given to them. The king calls Prince Yeoning and asks him to tell him everything that he knows about the recent incidents. When he does, the king is deeply moved and decides to give Prince Yeoning three days to prove himself innocent. The investigation of the murders lead to human trafficking deals with Qing and to the courtesan house.

The girl belonging to the master murdering group was arrested and Prince Yeoning is accused of supporting the group. The Patriarchs are putting pressure on the king to have the Crown Prince dethroned. Park Moon Soo and his colleagues try to stop the Saheonbu from investigating and beating the master murderers but fail. The heads of both parties meet to discuss future matters and Min Jin Heon is adamant that the kingdom is run by the nobility.

The nobility demands the king to dethrone the Crown Prince but the king is clear that this will not be granted. Prince Yeoning does his part by attending a banquet and making a speech on behalf of the peasants, speaking for their rights. The nobility is outraged about the palace standing against them but the commoners risk their lives to show support for the Crown Prince. Yeo Ji tells Prince Yeoning she wants to become a court lady to protect him.