Si Woo is a songwriter and leader of the group MoBius. While preparing for a concert, he notices that something is wrong with his hearing. He goes to see a doctor only to hear devastating news. With his life crumbling down, he tries to find Moorim School. Meanwhile, Chi Ang comes to Korea to attend the MoBius concert. His father orders him to go to Moorim. The two meet in front of the school and find something strange.