Lee RaeMin has been blind since her birth, she has a younger sister who isn't blind and her parents don't know what to do with RaeMin, so they just let her follow her passion, learning to play the piano like her mother when she was younger and she used to play the piano and sing songs before she got busy with her professional job.
She meets Kim MinSeok in her Music School, and when he entered her life, she felt better about being blind rather than seeing it as a weakness. Until one day, everything changes and she decides to commit suicide as well.
She's bullied in school. An outcast. He's the maknae of the famous kpop group, EXO. They meet unexpectedly and he learns of her 'problems'. He starts to fall for her, while she falls into a deeper hole called depression. Will he be able to pull her out of it or will she be lost forever?