It is the North-west coast of Scotland and there's a stranger in town - a shambling silent hulk of a man, face hooded even at the height of summer. He hangs around school playgrounds, laughing; leers through bedroom windows; camps out in a filthy old concrete pillbox. Meanwhile, Rob and Karen, newly married, settle into their new life together. Rob has been taken on as a janitor in the local school and begins to hear about the hooded man. Unpleasant things begin to happen. Unspeakable things. It is time for a showdown. It is time to find the Bunker Man.