Yoon Sul Chan (Yong Joon Hyung) is vocalist of fictional band called Men in Black. His past have made him, cold, cynical, and hot temper that get him in many troubles. Therefore, he was sent to new high school where he has to behave or else. Yoon Sul will join the high school band and help his fellow students achieve their dream. He will be a pair with Min Se Yi (Ha Yeon Soo), a high school student who moved to Korea from New Zealand and though she isn’t interested in school or her studies, she feels happy whenever she sings. Min Se will join the band with Yoon Sul Chan and gets involved in the incidents scattered throughout the story.