You and I are tuned in our music no matter how far we are.

Top K-pop composer G-Feel lacks inspiration and spends his days drinking after learning that his ex-girlfriend Yun-hee passed away in Vietnam. One day, he sees a clip on the Internet of someone playing the piano. It is Mi, a Vietnamese girl, who dreams of becoming a musician. Overwhelmed by unknown feelings, G-Feel arranges Mi’s piano piece into trendy K-pop song, but he has no means to contact her. So, he impulsively leaves for Vietnam to look for the writer of that song. There, he accidentally accompanies Mi without knowing that she is the one he’s looking for.