Aurora is a foreign rock band. The band that he discovered by chance during his school days became Gio's muse. After that, Gio entered the path of music and became a talented composer. However, Aurora, who inspired him, could not survive in the overflowing music market and disappeared. A mysterious man, Seongyu, appears in front of Gio, who cannot forget the voice of Aurora's vocalist. It is a suspicious first meeting, but through his close friend Heeseop's story, he hears the great news that Seongyu's voice resembles Aurora's vocalist... "Hyung, please sing just once!" "No." Just one verse... Why is it so hard~!