Jinki is an artist who has a neurological condition called Synthesia, which means he can see colours in sounds. Jonghyun happens to be a famous musician in the country, whom Jinki is a fan of. An accident partially blinds the artist, and he knows that he will soon lose his sight completely. The only thing that comforts him is Jonghyun’s voice, but how would he react when finding out the cause of the accident?