Secret Door
비밀의 문
We checked 8 streaming services in India on 04 Jun 2026 at 20:39 IST
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 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
as Crown Prince Sado
Kim You-jung
as Seo Ji-dam
Yoon So-hee
as Seo Ji-dam / Park Bingae
Han Suk-kyu
as King Yeongjo
Park Eun-bin
as Lady Hyegyeong
Kim Min-jong
as Na Chul-joo
Lee Won-jong
as Park Mun-su
Kwon Hae-hyo
as Seo Kyoon
Jeon Kuk-hwan
as Lee Jong-sung
Jang Hyun-sung
as Hong Gye-hui
Uhm Hyo-seop
as Min Baek-sang
Kim Ha-kyoon
as Kim Sang-ro
Choi Won-young
as Chae Je-gong
Seo Jun-young
as Shin Heung-bok
Ha Seung-lee
as Queen Jeongsun
Park Hyo-ju
as Woon-shim
Kim Tae-hun
as Kang Pil-jae
Jeong Gyu-su
as Yang Soon-Man
Kwak Hee-sung
as Kim Moo
Jo Woo-jin
as Lee Dal-seong
Seasons
Episodes
Season 1
Episode 1
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.
Episode 2
Heung Bok's body is found and the conspiracy to cover-up his murder begins.
Episode 3
Unsatisfied with the result of the investigation into Heung Bok's death, Crown Prince Sado re-opens the case, personally heading it himself.
Episode 4
Prince Sado succumbs to all evidence painting Heung Bok as a traitor, that is until Ji Dam approaches him with proof to the contrary.
Episode 5
With Ji Dam's help, Prince Sado delves deeper into the conspiracy behind Heung Bok's death.
Episode 6
Ji Dam hides out in a brothel while Prince Sado discovers the meaning behind Jung Woon's dying message.
Episode 7
Prince Sado seeks out the identity of the man Heung Bok's final royal painting.
Episode 8
An investigation into yet another death leads Prince Sado to suspect one of the people he trusts most.
Where does Secret Door rank today?
Secret Door is #1540 on the CineFlixo Daily Streaming Charts today.
- Highest: #1540
- Top 10: 0 days
- Top 100: 0 days
Watch Secret Door Online Free — All Episodes in HD
Looking for a place to watch Secret Door online for free? You've landed on the right page. Secret Door is a talked-about Coreano drama, history, and mystery series from 2014 that you can stream right now on CineFlixo in high quality, no signup required.
About 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. Across 1 season and 24 episodes, originally airing on SBS.
Secret Door Cast and Characters
The cast features Lee Je-hoon (as Crown Prince Sado), Kim You-jung (as Seo Ji-dam), Yoon So-hee (as Seo Ji-dam / Park Bingae), Han Suk-kyu (as King Yeongjo), and Park Eun-bin (as Lady Hyegyeong). Their performances are a major reason Secret Door has built such a passionate audience.
Where to Watch Secret Door Online
CineFlixo lets you stream Secret Door online free, instantly, in HD. There's nothing to install — open the page, hit play, done. Works perfectly on Jio, Airtel, Vi networks across India and on slow mobile data thanks to our adaptive video pipeline.
▶ Watch Secret Door NowWhy People Are Watching Secret Door
Secret Door flies under the radar but it deserves your attention. What makes it work is emotional weight that hits where it counts and tight pacing that earns its twists. If you enjoy Coreano storytelling that doesn't follow the same tired beats, this is the kind of show you'll end up recommending to friends.
Frequently Asked Questions about Secret Door
Where can I watch Secret Door online for free?
You can watch Secret Door online free on CineFlixo. Just open the page and hit play — no signup, no subscription, full HD streaming on phone, tablet, or desktop.
How many episodes does Secret Door have?
Secret Door has 24 episodes across 1 season. All episodes are available to stream right here on CineFlixo.
Is Secret Door good? What's the rating?
Secret Door holds a 5.5/10 rating based on 12 reviews — a niche pick worth checking out.
Who is in the cast of Secret Door?
The main cast includes Lee Je-hoon, Kim You-jung, Yoon So-hee, and Han Suk-kyu, plus a strong supporting ensemble.
Is Secret Door available in Coreano?
Yes — Secret Door was originally produced in Coreano and that's the version you'll stream here on CineFlixo. English subtitles are provided when available.
When was Secret Door released?
Secret Door first aired in 2014.
Do I need an account to watch Secret Door on CineFlixo?
No. CineFlixo is free and you can watch Secret Door without creating an account. Sign-up is optional — only useful if you want a personal Watchlist or to comment on episodes.
Similar Series You Might Like
If you enjoyed Secret Door, check out Hwajung, Hwang Jin Yi, Moon River, Queen: Love and War, and The Nokdu Flower.
Frequently Asked Questions
Where can I watch Secret Door for free?
You can watch Secret Door online for free on CineFlixo. All 24 episodes across 1 season are available to stream in HD without a subscription, signup, or paywall. Just open the show page and press play.
How many seasons and episodes does Secret Door have?
Secret Door currently has 1 season and a total of 24 episodes. The series status is "Ended", so the episode count may grow as new seasons are released. You can browse the full episode list on CineFlixo and continue watching from where you left off.
What is Secret Door 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 years, the strain on… It belongs to the Drama, History, Mystery genres.
In which language is Secret Door originally available?
Secret Door was originally produced in KO. On CineFlixo the show is available in its original KO audio. Check the player options on the watch page for available subtitle tracks.
When was Secret Door first released?
Secret Door first premiered on September 22, 2014 (2014). The series has since concluded its run.
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