随着时代的进步，韩国的民族音乐进入了蓬勃发展的飞速时期，赵英楠（金仁权 饰）、李章熙（晋久 饰）和宋昌植（赵福来 饰）是活跃于舞台之上的音乐家们，他们所在的音乐工作室“C’est Si Bon”亦成为了爱好者们口口相传的音乐圣殿。 　　尹亨朱（姜河那 饰）是工作室内冉冉升起的一颗星星，然而，他和前辈宋昌植之间的关系却格外紧张。在社长的建议之下，势同水火的两人组成了名为“Twin Folio”的组合，希望两人奇异的关系能给音乐带来独特的味道。之后，极富才华的吴根泰（郑宇 饰）被李章熙相中亦加入了组合。当性感美丽的闵紫英（韩孝周 饰）出现在三人面前之时，坠入情网的三人决定为了他们共同的女神努力奋斗。Oh Geun-tae (JUNG Woo) is a country boy with a booming baritone who is discovered by aspiring singer-songwriter Lee Jang-hui (JIN Goo) and thrust into the bustling world of Seoul's iconic folk music café-C'est Si Bon. Unwittingly, he becomes the third member of the yet-to-debut "C'est Si Bon Trio" and the begrudging buffer between two rival musicians-the vocal genius, Song Chang-shik (JO Bok-rae), and the heartthrob, Yoon Hyeong-ju (KANG Ha-neul). Amidst the smoke and chatter of C'est Si Bon's youthful clientele, they meet aspiring actress Min Ja-young (HAN Hyo-joo) and find themselves completely bewitched. Will their muse inspire them to create legendary music, or tear them apart before they even begin?