It was episode 4 that aired.
This episode is about the upcoming 40th birthday of the king, where the son, Lee Gu (Park Bo Gum), is ordered to receive a delegation of ambassadors from the Qing Dynasty, for which he recruits prostitutes from all over the country. The ministers are initially disdainful, but feel threatened after seeing the stage prepared by the son.
On the king's 40th birthday, the prostitute Ai Ai, who was scheduled to perform a solo dance at the end of the program, suddenly disappeared. Eunuch Mu, who came as an envoy from the Qing Dynasty, made an impolite request for tribute to Joseon, and there was a clash between the king, who wanted Lee Gu to listen to the government by proxy, and Kim Hyeon, who took an interest in the solo dancer, actress Hong Lak-geun (Kim Yoo-jung).
Expanded profile:
Synopsis:
Tells the story of Lee Gu (played by Park Bo Gum) The story is about Lee Gu (Park Bo Gum), the eldest son of the 23rd King of Joseon, Junjo, who is a cold and critical person and has taken over his father's administration at the age of 19, and Hong Lak Gu (Kim Yoo Jung), who was asked by his mother to dress up as a man and become Hong San Jae from the time he was old enough to know better.
Hong is separated from her mother at the age of 8 and grows up writing love letters and analyzing love strategies to make money. When Li Gu goes to the palace to meet the man who exchanged love letters with his sister, he sees Hong Le Gu disguised as Hong San Jie. The two of them have a hard time getting to know each other, and in order to abuse Hong Nei Gu properly, Li Gu does everything he can, but realizes that he likes the story of this "man" more and more.