The Page Turner (movie, 2006)

Mélanie Prouvost, a ten-year-old butcher's daughter, is a gifted pianist. That is why she and her parents decide that she sit for the Conservatory entrance exam. Although Mélanie is very likely to be admitted, she unfortunately gets distracted by the president of the jury's offhand attitude and she fails. Ten years later, Mélanie becomes her page turner, waiting patiently for her revenge.