With the progress of the times, Korean folk music has entered a period of rapid development. Cho Young-nam (Kim In-kwon), Lee Jang-hee (Jin Goo) and Song Chang-sik (Jo Bok-rae) are musicians active on the stage. Their music studio "C'estSiBon" has also become a music temple passed down by word of mouth by fans. Yoon Hyung-joo (Kang Ha-na) is a rising star in the studio, but the relationship between him and his predecessor Song Chang-sik is particularly tense. Under the advice of the president, the two who are like water and fire formed a group called "TwinFolio", hoping that the strange relationship between the two can bring a unique taste to the music. Later, the talented Oh Geun-tae (Jung Woo) was selected by Lee Jang-hee and joined the group. When the sexy and beautiful Min Ziying (Han Hyo-joo) appeared in front of the three, the three who fell in love decided to work hard for their common goddess.