Short recap on this episode...
While Park Dal Hyang created chaos during the final exam, hitting the horse instead, Crown Prince was having fun. He even suggested to the King that he passed Dal Hyang and gave him a low position for a start. Regarding the Crown Prince and his wife, I think that even if they are married for years now, he does not love her. The chosen Crown Princess was dead. She was reported to had taken her own life [suicide]. The Crown Prince loved her.
Seung Po and Min Seo invited Dal Hyang for a congratulatory drink. Inside the taverna, Seung Po was having the time of his life, gambling and womanizing. Min Seo was the silent type. He told Dal Hyang that Seung Po and the Prince grew up together.
While they were drinking a group of men walked upstairs to where they sat. They were the ministers from the palace. Something was definitely fishy so Seung Po decided to go inside the next room to listen. They were plotting something. Messengers from Yong Gol Dae arrived. He was dealing with the Qings.
Fight erupted when Seung Po was found out by No Soo, the one eyed man. She was with a woman, who the Prince will soon find out as Jo Mi Ryeong , his dead First Crown Princess.
What happened to her? Why did she lie to him?
Dal Hyang followed the two[No Soo and Mi Ryeon], chased them when they got away after No Soo hurt the Prince's arm with his blade.
Dal Hyang stopped when he realized he was in a dangerous territory. The large group were waiting at the hillside where No Soo and Mi Ryeong stopped their horses. Then Gol Dae asked him who he was. Mi Ryeong told him he was a Prince's person. Soon, arrows were flying in the sky, targeting Dal Hyang.