I am so intrigued by this story and I was with it all the way to the end. But, I was left hanging there.
There's no way to verify if it's real is the last thing I hear. So I find myself wondering why I needed to hear about it.
If I knew that it couldn't be confirmed before the final music, but was left with that tidbit of song, I would know that it was something I'd have to decide for myself. But, as it is the final sentence kind of deflates the tension and surprise in the piece.
If I were the editor of this piece, I would advise just that little tweaking of the final thought and then I'd definitely buy it.