A claustrophobic, old-school thriller, making very good use of a (mostly) single location. Great ensemble acting and a nice twist ending which rewards viewing all the way through. As someone who has only visited Martha's Vineyard in the summer and heard tales of the "off-season population", I was very curious to watch this film. It captured the atmosphere and sense of place very well and made me want to go back again, despite making me way more wary of those "off-seasoners"! Recommended.