Secret Door (2014) is a Drama, History, Mystery series that follows 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. Currently, you can watch Secret Door on Rakuten Viki, OnDemandKorea, Kocowa Amazon Channel, Kocowa. Streaming availability may vary by country and platform over time. It has a user rating of 5.5 out of 10 from 12 votes. Fans of drama series may also want to explore similar titles below.