Lee Sun took on the blame of committing murder and was locked up.
On the 10th episode of SBS Monday/Tuesday drama "Secret Door" (script Yoon Sun Joo, director Kim Hyung Shik) broadcast on October 21st, Yeong Jo (played by Han Suk Kyu) asked Lee Sun (played by Lee Je Hoon) what his crime was.
Kang Pil Jae (played by Kim Tae Hoon)'s murder case. At the scene of the murder, Lee Sun's personal knife had been found. Lee Sun was found to be the suspect and was called to stand in front of Yeong Jo. Yeong Jo started to interrogate Lee Sun asking why he went to go find Kang Pil Jae. Lee Sun simply said that he needed to look into something and spared his words. In actuality, Lee Sun had wanted to look into the truth behind the order to kill Shin Heung Bok (played by Suh Joon Young) and went to inquire these facts.
Meanwhile, SBS Monday/Tuesday drama "Secret Door" is a period drama tha follows the conflict between King Yeongjo (played by Han Suk Kyu) and Crown Prince Sado (played by Lee Je Hoon). Kim Yeong Jo has an authoritarian ruling style whereas Crown Prince Sado insists on equality for all.