The problem with The Lady in Black is that it's boring. Not just slow, because a slow horror movie should really build suspense as it ramps up to the ed, but very dull.
It's the story of a sad man who lost his wife when she gave birth to their son four years ago. The sad man is sent to a small town to settle an estate. There he is sad and kids die and he sees a female figure wearing black and that's about it.
Oh, and the movie ends "happily" with the sad man and his son dying but they get to rejoin their wife/mother in the afterlife.