Gina, who has a mediocre talent, but is forced to play the violin as the only daughter of a big company.
Kyung-mi, who had a genius talent, but was born as the daughter of a poor chauffeur and gave up on playing the piano.

As Kyung-mi's father works as a driver for Gina's family, the two meet and get closer through the link of music.
Three years of puberty with music, they feel friendship and gradually love.