On the night of March 14th 2001, exactly one day after the incident at Yeondu High, four individuals return to the school in search of answers to the unsolved mysteries that haunt them. Episode 1: Disturbed by rumours of her involvement in the death of a fellow student, Jung Soo-jin is determined to set the record straight and regain the trust of her crush Jang Sung-tae. But as the pair search for clues, they learn of a far darker secret deep within the bowels of the school, and become prey in a relentless hunt. Episode 2: At the same time, for...