Secret Door - Season 1 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.
- Genre: Drama, History, Mystery
- Studio: SBS
- Keyword: joseon dynasty
- Cast: Lee Je-hoon, Kim You-jung, Yoon So-hee, Han Suk-kyu, Park Eun-bin, Kim Min-jong