Gap is the frontman of an unknown band called Evening Sunday and Namwa is a devoted member of the fandom of a ghost ship. After a messy first meeting, the two are thrown into a group project together at university. Through her connections, Gap's band gets the opportunity to rehearse in a high-class studio where they learn that Namwa is the younger sister of a world-famous music producer. Gap thinks he can get Namwa to help Evening Sunday grow.