Where to Watch
Region
Kocowa
Stream included
HD
Included
Rakuten Viki
Stream with ads
HD
Included
Rakuten Viki
Stream included
HD
Included
OnDemandKorea
Stream included
HD
Included
Kocowa Amazon Channel
Stream included
HD
Included
Prices last updated September 11, 2026. Pricing and availability may vary by region.
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Seasons
All seasons
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.
First Aired
Sep 22, 2014
Last Aired
Dec 9, 2014
Seasons
1
Episodes
24
Original Title
비밀의 문
Original Language
Korean
Keywords
Cast
Full credits →L
Lee Je-hoon
Crown Prince Sado
K
Kim You-jung
Seo Ji-dam
Y
Yoon So-hee
Seo Ji-dam / Park Bingae
H
Han Suk-kyu
King Yeongjo
P
Park Eun-bin
Lady Hyegyeong
K
Kim Min-jong
Na Chul-joo
L
Lee Won-jong
Park Mun-su
K
Kwon Hae-hyo
Seo Kyoon
J
Jeon Kuk-hwan
Lee Jong-sung
J
Jang Hyun-sung
Hong Gye-hui
U
Uhm Hyo-seop
Min Baek-sang
K
Kim Ha-kyoon
Kim Sang-ro
C
Choi Won-young
Chae Je-gong
S
Seo Jun-young
Shin Heung-bok
H
Ha Seung-lee
Queen Jeongsun
P
Park Hyo-ju
Woon-shim
K
Kim Tae-hun
Kang Pil-jae
J
Jeong Gyu-su
Yang Soon-Man
K
Kwak Hee-sung
Kim Moo
J
Jo Woo-jin
Lee Dal-seong
