

Secret Door
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.
Cast

Lee Je-hoon
Crown Prince Sado

Kim You-jung
Seo Ji-dam

Yoon So-hee
Seo Ji-dam / Park Bingae

Han Suk-kyu
King Yeongjo

Park Eun-bin
Lady Hyegyeong

Kim Min-jong
Na Chul-joo

Lee Won-jong
Park Mun-su

Kwon Hae-hyo
Seo Kyoon

Jeon Kuk-hwan
Lee Jong-sung

Jang Hyun-sung
Hong Gye-hui

Uhm Hyo-seop
Min Baek-sang

Kim Ha-kyoon
Kim Sang-ro

Choi Won-young
Chae Je-gong

Seo Jun-young
Shin Heung-bok

Ha Seung-lee
Queen Jeongsun
Seasons

E1Episode 1
Sep 22, 2014
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.

E2Episode 2
Sep 23, 2014
Heung Bok's body is found and the conspiracy to cover-up his murder begins.

E3Episode 3
Sep 29, 2014
Unsatisfied with the result of the investigation into Heung Bok's death, Crown Prince Sado re-opens the case, personally heading it himself.

E4Episode 4
Sep 30, 2014
Prince Sado succumbs to all evidence painting Heung Bok as a traitor, that is until Ji Dam approaches him with proof to the contrary.

E5Episode 5
Oct 6, 2014
With Ji Dam's help, Prince Sado delves deeper into the conspiracy behind Heung Bok's death.

E6Episode 6
Oct 7, 2014
Ji Dam hides out in a brothel while Prince Sado discovers the meaning behind Jung Woon's dying message.

E7Episode 7
Oct 13, 2014
Prince Sado seeks out the identity of the man Heung Bok's final royal painting.

E8Episode 8
Oct 14, 2014
An investigation into yet another death leads Prince Sado to suspect one of the people he trusts most.

E9Episode 9
Oct 20, 2014
Prince Sado is accused of murder.

E10Episode 10
Oct 21, 2014
Teacher Park Moon Soo makes a deal to try and save Prince Sado from prison.

E11Episode 11
Oct 27, 2014
Prince Sado becomes suspicious of his father's role in the document.

E12Episode 12
Oct 28, 2014
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.

E13Episode 13
Nov 3, 2014
King Yeongjo unleashes his punishment on the booklenders.

E14Episode 14
Nov 4, 2014
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.

E15Episode 15
Nov 10, 2014
In order to get his governing powers back, Prince Sado begins difficult negotiations with the Qing.

E16Episode 16
Nov 11, 2014
Kim Taek sets a plan in motion to oust and replace Prince Sado.

E17Episode 17
Nov 17, 2014
Prince Sado returns to the regency and sets out to make the country a better place for all classes.

E18Episode 18
Nov 18, 2014
King Yeongjo and Prince Sado clash over allowing commoners entrance to the civil service exam.

E19Episode 19
Nov 24, 2014
Prince Sado faces the fallout of allowing commoners take the civil service exam.

E20Episode 20
Nov 25, 2014
The Noron set a new plan in motion to oust the Crown Prince.

E21Episode 21
Dec 1, 2014
On the eve of the new Queen announcement ceremony, the Prince discovers a plot to assassinate the King.

E22Episode 22
Dec 2, 2014
The Noron set out to discover why the Prince has been sending funds to the North.
E23Episode 23
Dec 8, 2014
E24Episode 24
Dec 9, 2014
Storyline
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.
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