Secret Door

A document, thought long destroyed, tying King Yeongjo's ascension the throne to the Noron Faction, resurfaces. Crown Prince Sado distrupts the government by proclaiming the creation and distribution of books by commoners legal.

Heung Bok's body is found and the conspiracy to cover-up his murder begins.

Unsatisfied with the result of the investigation into Heung Bok's death, Crown Prince Sado re-opens the case, personally heading it himself.

Prince Sado succumbs to all evidence painting Heung Bok as a traitor, that is until Ji Dam approaches him with proof to the contrary.

With Ji Dam's help, Prince Sado delves deeper into the conspiracy behind Heung Bok's death.

Ji Dam hides out in a brothel while Prince Sado discovers the meaning behind Jung Woon's dying message.