Young Shi-in, a quiet and unassuming high school student, spends his time diligently studying and preparing for exams. However, his class is plagued by a bully who, after being rebuffed by Shi-in, decides to sabotage his exam with the help of a new student. However, Shi-in finds an unexpected ally in An Su-ho, a former athlete who spends most of his time sleeping in the back of the classroom.