Kim Joon Young disgused Suh Joon Young's death as not a murder but a suicide.
On the 2nd episode of SBS Monday/Tuesday drama "Secret Door" (script Yoon Sun Joo, director Kim Hyung Shik) broadcast on September 23rd, the main cabinet member Kim Taek (played by Kim Chang Wan) worked with Young Jo (played by Han Suk Kyu) and disguised Shin Heung Bok (played by Suh Joon Young)'s death as a suicide.
Kim Heung Bok who had hid the secret document that was the weakpoint of Young Jo was murdered. Before Kim Taek could make a move, someone is messing with the corpse.
Kim Taek and Young Jo feel that there is someone behind the scheme that knows about the presence of the breat doctor and start to realize that someone is attempting to disguise Shin Heung Bok's death as a suicide when it was really a murder by people in the opposition party.
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.