Someone asked a group I belong to this question:

Does anyone know of a classical piece that has a story attached to it about sneaking a person into or out of a place?

She later elaborated on this with:

I’m hoping to find a story that is ABOUT the sneaking itself – or at least it’s a major part of the plot. Not merely an event that happens in passing. Perhaps I should further add, if it involves either kidnapping or rescuing, that would be a plus.

… so … anyone want to offer up a suggestion or two?