<Korean TV Series NOW> ”Undercover High School” EP11, Seo Kang Joon is falsely accused = Viewership rating 6.0%, Synopsis and spoilers

※This article contains spoilers. In EP11 of the MBC TV series "Undercover High School" (viewer rating 6.0%), Hye-sung (Seo Kang-Joon) is accused of murder.
The scene of Kim Shin-Rock being dressed in a suit is shown. When the door to the underground passage under the bust opens, Myung-Ju (Kim Shin-Rock) enters it to look for gold bars. However, there is no trace of gold bars in the underground passage.
Myung-ju was furious. Hye-sung found her father's skeleton in the basement and discovered a bullet there. After examining it, it was discovered that the bullet had only been used by the National Intelligence Service team leader level or above 22 years ago.
When it turns out to be a firearm, and he finds out that Director Kim (Lee Seo-hwan) had reported the cartridges as lost at the time, Hae-sung becomes furious.
Hye-sung rushes into the hotel room where Director Kim is staying and points a gun at him, asking why a bullet came out of his father's body.
As the two men were struggling violently, security personnel came in and pulled Hye-sung away. Su-a (Jin Ki Joo) and four domestic teams from the National Intelligence Service rushed to Hye-sung's
They chased after him, but he had already been taken away by security personnel. Seeing this, four domestic teams got into a scuffle with the security personnel before Hyesung managed to escape safely.
Meanwhile, Hye-sung also suspected Myung-ju. The discovery of her father's notebook and death both happened at Byeong-mun High School, and she was also involved in the operation.
However, since it was Myung-ju and Director Kim, he had no choice but to focus on Myung-ju. Also, Hae-sung, who had installed wiretapping and location tracking on Director Kim's cell phone, heard some shocking news.
One day, when her father met with Myung-ju, Director Kim, and Jae-moon (Park Jin-woo), they were scuffling and Myung-ju shot and killed her father.
Meanwhile, Hye-sung goes to see Director Kim and is shocked to find him bleeding and collapsed in his car, but is hit in the head by someone and loses consciousness.
As a result, Hye-sung is falsely accused of murdering Director Kim.