Synopsis

Hae Seong and his team, following a break-in, identify the perpetrator as Lee Jun Ho, the mathematics teacher. The culprit is revealed after Hae Seong discovers his father’s notebook is missing, realizing Seo Myeong Ju orchestrated the crime. With Lee Jun Ho apprehended and confessing, the subsequent exposure of a school-wide grade-rigging scandal plunges the institution into turmoil. Amidst the chaos, Hae Seong uncovers a vital clue to the final, chilling narrative.