Where to watch Secret Door in the US
You can stream Secret Door in the US on Viki, OnDemandKorea, Kocowa Amazon Channel, Kocowa, Viki.
Included with subscription
Availability updated November 4, 2026. All options and prices
Secret Door plot
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.
Secret Door cast
Lee Je-hoonCrown Prince Sado
Kim You-jungSeo Ji-dam
Yoon So-heeSeo Ji-dam / Park Bingae
Han Suk-kyuKing Yeongjo
Park Eun-binLady Hyegyeong
Kim Min-jongNa Chul-joo
Lee Won-jongPark Mun-su
Kwon Hae-hyoSeo Kyoon
Jeon Kuk-hwanLee Jong-sung
Jang Hyun-sungHong Gye-hui
Uhm Hyo-seopMin Baek-sang
Kim Ha-kyoonKim Sang-ro
