Grace is a religious woman who lives in an old house kept dark because her two children, Anne and Nicholas, have a rare sensitivity to light. When the family begins to suspect the house is haunted, Grace fights to protect her children at any cost in the face of strange events and disturbing visions. In 1945, immediately following the end of Second World War, a woman who lives with her two photosensitive children on her darkened old family estate in the Channel Islands becomes convinced that the home is haunted.