기간제 교사가 된 사회 초년생 고하늘이 우리 삶의 축소판인 '학교'에서 꿈을 지키며 살아남기 위해 고군분투하는 이야기
Ko Ha-Neul dreamed of becoming a teacher, due to a teacher who helped her when she was young. Ko Ha-Neul now begins work as a temporary teacher at a private high school. While working there, she interacts with many people, including teachers Park Sung-Soon and Do Yeon-Woo. Both of whom are dedicated to their teaching jobs. Meanwhile, Ko Ha-Neul faces different problems at the school. As she works through those problems, Ko Ha-Neul grows as a person and a teacher.