Slow burn isn't the expression of this film I would use. It started as, no burn. I almost turn it off because it was too dull and uninteresting. As it developes slowly, little clues that the house isn't quite normal, arrise. Add a writer with writer's block, a wife left to do the restoration of their home. ALONE! A feeling of being taken for granted, overwhelming responsibility gives way to panic which gives way total loss of control. Insanity and inhumanity.