It's best to walk into Dark Waters knowing that it's going to be an exercise of style over substance. As great and moody as the atmosphere of this movie is, the story itself is murky and hard to pin down. As best as I can tell, it's about a young woman whose father dies and she visits a strange island monestary that her father had been sending money to for years. Once she gets there, she gets the feeling that she's very unwelcome and she might unearth some truths that are better left buried.
One thing Dark Waters gets right is the atmosphere. If I didn't know any better, I'd truly believe this was a film shot in the mid-70's by some Italian horror master. It's beautifully shot with so much attention to detail. It's just a shame that the script didn't seem to have as much thought put into it. At one point, the lead character is attacked by a psychotic nun and she reacts to this as if she's just stubbed her toe. There's no sense of urgency at all. Wouldn't someone who'd just been attacked want to get out of there as soon as possible?