At a small girls’ high school on the outskirts of Gyeonggi Province, an ordinary day begins—until the homeroom teacher fails to show up.While the other students brush it off, Yun-ji, a loner, is quietly shaken. She has been secretly dating her teacher, Jong-sung, to whom she recently confessed her pregnancy. Since then, he has vanished.When Jong-sung’s wife, Min-young, storms into the classroom, Yun-ji sneaks out of school to purchase illegal abortion pills.