1x11 - Undercover High School

The gold bars vanish just as they are within reach, and Seo Myeong Ju suspects Hae Seong has them. In the vault, Hae Seong makes a heartbreaking discovery of his father's remains. Overcome with grief, he finally finds closure, but a shocking truth emerges. He learns Director Kim Hyung Bae was behind it all. Determined to uncover the whole story, Hae Seong heads to confront him alone.