Such a rare, rare treat it is that a truly chilling ghost story can be found that eschews lurid and fatuous shocks in favor of unexpected frights and unnerving ambience. Set in post-World War II Jersey, off the coast of Normandy, the film follows war-abandoned mother Grace Stewart and her two children, who apparently suffer from a photosensitive disease called xeroderma pigmentosum that precludes them from exposure to sunlight.