In-Soo, portrayed by Kang Ha-Neul, possesses the unique ability to see spirits, which has led to his alienation from his peers. Seeking a fresh start, he enrolls in a high school located in the countryside near Seoul. At this new school, In-Soo encounters a ghostly girl, played by Kim So-Eun, and they develop a bond. However, as their friendship unfolds, his fellow students begin to vanish mysteriously, one after another.