Mr. Park who was Bok Su's homeroom teacher in high school comes to visit Bok Su and suggests that he should go back to school and finish the study. Mr. Park's suggestion makes Bok Su recall a painful memory where he was falsely accused and forced to drop out of the school. In the meantime, Se Ho, who used to be Bok Su's schoolmate, comes back home from aboard. (thetvdb.com)