You, a princess, was forbidden to dance because of a curse in the kingdom. A curse that would kill anyone who sees a member of the royal palace dance.

As you play the piano in the ballroom that was never used again after that incident.

A handsome young man offers you to dance in this silent ballroom. He dances with you, he didn't speak the whole time. No one knew you danced. Few moments passed and you snap back to reality. The reality was... you, dancing all by yourself.