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Poster: Secret Door
Series

Secret Door

비밀의 문
2014EndedSouth Korea60 min

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What's it about?

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 …

Where to stream?

3 offers

Available

Rakuten Viki
Free with ads · Subscription
Checked 08/22/2026 · last check was a while ago · United States catalog · account required.
KOCOWA+
Subscription
Checked 08/22/2026 · last check was a while ago · United States catalog · account required.
OnDemandKorea
Subscription
Checked 09/29/2026 · last check was a while ago · United States catalog · account required.

Where else to find it

These offers belong to each country's catalog and usually can't be watched from here.

Availability data partly provided by JustWatch via TMDB.

Cast

20 of 27 people — scroll sideways

Episodes

Season 1 — 24 episodes · from 09/22/2014

Page 1 of 1 · Episodes 1–24

Still from episode 1

Episode 1

S01E0109/22/201458 min

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.

Still from episode 2

Episode 2

S01E0209/23/201459 min

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

Still from episode 3

Episode 3

S01E0309/29/201459 min

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

Still from episode 4

Episode 4

S01E0409/30/201459 min

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

Still from episode 5

Episode 5

S01E0510/06/201458 min

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

Still from episode 6

Episode 6

S01E0610/07/201459 min

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

Still from episode 7

Episode 7

S01E0710/13/201458 min

Prince Sado seeks out the identity of the man Heung Bok's final royal painting.

Still from episode 8

Episode 8

S01E0810/14/201459 min

An investigation into yet another death leads Prince Sado to suspect one of the people he trusts most.

Still from episode 9

Episode 9

S01E0910/20/201458 min

Prince Sado is accused of murder.

Still from episode 10

Episode 10

S01E1010/21/201459 min

Teacher Park Moon Soo makes a deal to try and save Prince Sado from prison.

Still from episode 11

Episode 11

S01E1110/27/201458 min

Prince Sado becomes suspicious of his father's role in the document.

Still from episode 12

Episode 12

S01E1210/28/201459 min

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.

Still from episode 13

Episode 13

S01E1311/03/201461 min

King Yeongjo unleashes his punishment on the booklenders.

Still from episode 14

Episode 14

S01E1411/04/201459 min

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.

Still from episode 15

Episode 15

S01E1511/10/201461 min

In order to get his governing powers back, Prince Sado begins difficult negotiations with the Qing.

Still from episode 16

Episode 16

S01E1611/11/201462 min

Kim Taek sets a plan in motion to oust and replace Prince Sado.

Still from episode 17

Episode 17

S01E1711/17/201461 min

Prince Sado returns to the regency and sets out to make the country a better place for all classes.

Still from episode 18

Episode 18

S01E1811/18/201461 min

King Yeongjo and Prince Sado clash over allowing commoners entrance to the civil service exam.

Still from episode 19

Episode 19

S01E1911/24/201460 min

Prince Sado faces the fallout of allowing commoners take the civil service exam.

Still from episode 20

Episode 20

S01E2011/25/201458 min

The Noron set a new plan in motion to oust the Crown Prince.

Still from episode 21

Episode 21

S01E2112/01/201462 min

On the eve of the new Queen announcement ceremony, the Prince discovers a plot to assassinate the King.

Still from episode 22

Episode 22

S01E2212/02/201462 min

The Noron set out to discover why the Prince has been sending funds to the North.

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Episode 23

S01E2312/08/201462 min

There's no description for this episode yet.

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Episode 24

S01E2412/09/201461 minFinale

There's no description for this episode yet.

Image gallery

Posters (7)

Stills (4)

Images © their respective rights holders · Source: TMDB