A temporary teacher Yu-jin is ordered by the principal to guide problematic students in extracurricular club activities. His intention is to prevent them from committing accidents at the outside after school. They include Jeong-hun who was expelled from the soccer club for a violent incident and Seong-a who picks up on other students. However, aiming at Seoul Students’ Club Festival, Yu-jin and the students start to practice a musical performance. Indeed, can their musical come out to the world?