Original title
비밀의 문
Released
9/22/2014
Origin country
KR
Genre
Drama, Mystery
Status
Ended
Number of seasons
1
Number of episodes
24
A re-imagining of the legendary tale of the troubled father-son relationship between King Yeongjo and his only son Prince Sado. While his father insists on a strong and centralized government, Crown Prince Sado promotes social justice and equality throughout the kingdom. Throughout eight fateful years, the strain on their relationship — both familial and political — eventually evolves into a total breakdown, ending with one of the most tragic stories in Joseon history.
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.
Prince Sado seeks out the identity of the man Heung Bok's final royal painting.
An investigation into yet another death leads Prince Sado to suspect one of the people he trusts most.
Prince Sado is accused of murder.
Teacher Park Moon Soo makes a deal to try and save Prince Sado from prison.
Prince Sado becomes suspicious of his father's role in the document.
King Yeongjo appoints a new Prime Minister and sets out to enact new tax reforms while Prince Sado struggles with what to do about his father.
King Yeongjo unleashes his punishment on the booklenders.
King Yeongjo strips Prince Sado of all governing power. Three years later, Prince Sado begins a secret plan beginning with taking Kim Taek as his new teacher.
In order to get his governing powers back, Prince Sado begins difficult negotiations with the Qing.
Kim Taek sets a plan in motion to oust and replace Prince Sado.
Prince Sado returns to the regency and sets out to make the country a better place for all classes.
King Yeongjo and Prince Sado clash over allowing commoners entrance to the civil service exam.
Prince Sado faces the fallout of allowing commoners take the civil service exam.
The Noron set a new plan in motion to oust the Crown Prince.
On the eve of the new Queen announcement ceremony, the Prince discovers a plot to assassinate the King.
The Noron set out to discover why the Prince has been sending funds to the North.
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