It seems there might be a confusion or misunderstanding. As of my last update in January 2022, there is no widely recognized or known movie titled "The Girl in the Pool" that matches the synopsis you provided. It's possible that this could be a newer release or a less widely known film.
If you could provide more context or details about the movie, I could try to help further. Alternatively, if it's a recent release or a lesser-known film, the information might not be readily available in my current dataset. Let me know how else I can assist you!