In the new SBS Monday/Tuesday drama "Secret Door" the door to the mystery period drama opened.

On the new SBS Monday/Tuesday drama "Secret Door" broadcast on September 22nd, Young Jo (played by Han Suk Kyu) and the crown prince Lee Sun (plyaed by Lee Je Hoon) started to get involved in a dynamic plot.

On the first episode, Young Jo rose to the top of reign and in the hands of his friend Shin Heung Bok (played by Suh Joon Young) were questionable documents. Afterwards, that friend faces an unexpected death and this became the plot.

Lee Sun started to want to start a business with his friend Shin Heung Bok. It was where the two would lend books and get money in exchange. Afterwards, they were at a risk of exposing their identity. There was no way that Hye Kyung Goong Lady Hong would not know about Lee Sun's activities and was completely distraught.

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.