Lee Shi Yoon is a pianist of the 21st century. After getting into an accident that left him unable to play the piano, he becomes resentful of his life and chooses death, only to wake up as the daughter of a rich family that uses an unfamiliar language, named "Tatiana". Is this an opportunity given by a god? Or is this a curse? Who cares if I switched genders! As long as my hands are fine, I can play the piano! Since things have come to this, I'll pursue the dreams I couldn't have through "Tatiana"!