The Crown Prince is Arrested - S1.E21

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. 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 nobility runs the kingdom.