Undercover High School Episode 2

Hae Seong comes dangerously close to blowing his cover while searching for the hidden gold in Byeongmun High School's eerie old building, barely escaping detection by Su A, his sharp-eyed homeroom teacher. As he hears chilling rumours and faces tight security surrounding the building, he believes that's where he'll find the gold. While dealing with school bullies, Hae Seong begins plotting his next move to uncover the dark secrets lurking inside the old building. (Source: Viu)