Amane Kaoru lives a night life, not because she wishes so, but because she is infected with the xeroderma pigmentosum virus. This virus defects the ability to repair damage caused by the sun's rays. Although she cannot expose her body to the sunlight, she dreams of becoming a singer, even if remaining positive has been ruined many times due to her illness. One night, playing outside, she meets Fujishiro Kouji, who has lost his job and hope, and becomes someone who reminds him of his long forgotten music passion.

Music producer and composer Ha Rib made a contract with the devil to trade his soul for fame. This devilish transaction brought him all the fame he could ask for, producing many hit songs. As the contract expiration draws near, he bargains with the devil for an extension. For that, he must find another person to sell the soul. Ha Rib finds a perfect candidate, but contemplates because she would have to suffer for 10 years for his selfish fame.

When street musician Tai Mingbut passes himself off as Imperial Music Bureau director Kiu Bolung in order to escape government officers, he gets pulled into a case of mistaken identity as the real Bolung lost part of his memory in a fire. To complicate things even further, they are joined by two women at the music bureau who become confused by the swap in the men's identities.