So basically: A skittish nurse moves into an isolated country house to care for a long-retired author. The author, Iris Blum, wrote ghost stories, and her most famous novel, The Lady in the Walls, was apparently inspired--surprise, surprise--by actual events. She claimed the story wasn't made up, but told to her by Polly, the ghost of a murdered young woman who'd lived in the house many years before. The nurse, Lily, has never read any of Iris's books, but that doesn't stop her from realizing that odd things are happening. For one, Iris insists on calling her "Polly". For another, a strange black mold's growing on the walls, and something keeps rattling beneath them.
I have kind of mixed feelings about this one. On one hand, it's a slow moving and very, very quiet ghost story that's beautifully filmed and written. On the other hand...it's a slow moving and very, very quiet ghost story. Plot comes second to building up a mood, and even though that mood is decently creepy it can't make up for the fact that not much happens, and what does happen isn't always explained. Leaving a couple threads dangling is great, but I wouldn't have minded a little more info about Polly, and why she decided to "tell" her story to Iris in the first place. (Or did she?) You also never get a clear sense of who these characters are as people. That, though, is the point of the movie, so I can't call it a fault. More or a it's-not-you-it's-me type of deal.
Overall I'd give the title five stars and the story itself three stars. I'll probably spotlight it for my next TFI post, which'll give me the chance to put my thoughts on it in better order.