SBS Monday/Tuesday drama "Secret Door" secrets behind the murder of Shin Heung Bok were brought to light.

In "Secret Door", the incident started with the sudden death of Shin Heung Bok (played by Suh Joon Young).

The crown prince Lee Sun (played by Lee Je Hoon) had been trusting his friend Shin Heung Bok and then he had suffered an unfortunate and mysterious death. This shocked everyone as he was found as a corpse in the royal foundation. His death seemed to have been sealed with the police chief Hong Ky Hee (played by Jang Hyun Sung). This had been concluded as a suicide but with the appearance of SUh Ji Dam (played by Kim Yoo Jung) the investigation reopened.

The second point was the secret document "Maeng Yi" Behind all of the scandals of Shin Heung Bok's death was the secret document between the two factions that was the dividing factor.

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.