A struggling novelist moves his wife and young son to an old country home where he intends to write his next bestseller, but when a presence begins to communicate with his son, the tortured family must fight to escape an evil that threatens to doom them to the house for eternity.
Six people bound together by a traumatic experience decide to round off a year of group therapy in style. They join each other once more, traveling up to the Scottish Lowlands for a reunion weekend in a 1970s holiday let. Soon a number of mysterious and horrifying events start to expose the cracks in their relationships, and one by one they discover that trust runs but skin-deep. A night of closure turns out to be far more final than they could have anticipated.