Premier Kim tries to poison Yeong and make Yunseong a new crown prince, but Yeong recovers from his illness thanks to Master Jung.

With Chief Eunuch Han and Byeongyeon's sacrifice, Raon and her father are able to escape from the palace successfully.

The palace guards capture Hong Gyeongnae alive and prepare for the interrogation. 

Yeong is heartbroken that he has become the person who only makes life difficult for Raon.

The Crown Prince finds out that Eunuch Hong is actually Hong Gyeongnae's daughter, but he cannot believe she approached him on purpose as a spy.

Raon finds out that she is Hong Gyeongnae's daughter and realizes she can never be safe in the palace.

Premier Kim's servant discovers that Hong Gyeongnae's daughter is called Hong Raon and she is currently in the palace.

The King persuades Yeong that he must marry Minister Cho's daughter to have more people on his side. 

Raon tells Yeong a story about the mermaid who falls in love with a prince and turns into sea-foam in the end.

Yeong continues to postpone the national exam to stop the corruption, which leads to more deepened conflicts with Kim Heon.

Yeong is about to start ruling as an interim king, but the conflict regarding the national exam between Yeong and Kim Heon deepens. 

Eunuch Ma and Wolhee must end their relationship because a eunuch and a court lady's love cannot be done.

Eunuch Ma secretly tells Envoy Mok Taegam that Eunuch Hong is a girl and the dancer he has been desperately looking for.

The mysterious maiden who performed the solo dance during the King's birthday festival is nowhere to be found, and the Crown Prince suspects Eunuch Hong to be the one.

Yeong suggests the King and the Ministers to get the Qing Dynasty's approval of his taking the throne in the interim after the King's birthday festival.

The King personally orders Raon to deliver his response of Consort Park's letter, and it turns out to be a secret letter written with apple vinegar. 

To become the official eunuch, the trainees have to pass three exams which are the physical fitness, the written exam and the character test. They will be kicked out of the palace once they fail at least one of them. 

Raon disguises herself as a man named Samnom and does all kinds of work to earn money, pay off the debts and find her mother. One day, she is kidnapped by the moneylenders, and they sell her to the Office of Eunuch Attendants to get their money back.