A family comedy
The idea is Emily is a child prodigy pianist, but nobody ever sees her play the piano.
Penultimate scene: There is a high stakes tryout of a prestigious Piano college. All of the applicants have to play the same piece of music they’ve all just received. The music piece they have to play is complicated and tons of kids fail miserably. Emily may or may not be able to play this piece perfectly…we don’t know because we’ve never seen her play!
At the last moment, when they call her name to the stage…Emily sits at the piano…takes a breath…turns to the judges and says “Should I play the error?” They act all dumb, like…what do you mean? and Emily is like “I know this piece - it is from some weird obscure pianist from history, and you’ve transcribed it incorrectly and that’s why all these kids have been failing. I’m asking…do you want me to play the error?”
Everybody starts cheering and clapping because she’s figured out the puzzle, they call her the big winner and the show ends.
We never learn if she can actually play the piano.