The top songwriter of his day, Yoon-woo tries to write, 'Joseon's Heart', a song to console the hearts of the oppressed Korean people living under Japanese colonial rule. Eager to sing Yoon-woo's song, So-yool dreams of becoming a singer instead of an artist. However, Yoon-woo hears Yeon-hee's voice by chance and gets drawn to her singing more and more.