I can read a short story and appreciate the art of the telling, as in this case. The prose is quite artful, and the increasing sense of foreboding is very well developed.
However, I'd hate to invest a couple hours in a movie only to be left confused and/or saddened, especially when the main plot premise is hidden from the viewer such that the movie is largely pointless, leaving the viewer unsatisfied and discomfited as the credits role. This sounds like one of those types of movies. Not my idea of a pleasant evening.
Link: https://loa-shared.s3.amazonaws.com/static/pdf/Cheever_Swimmer.pdf