In 1922, middle-aged University Don Edward Williams (Rory Kinnear), is sent a somewhat “indifferent” mezzotint (a monochrome print made from an engraved copper or steel plate) on approval from one of his regular art dealers. On arrival the mezzotint features an unidentified English country house and has no distinguishing features to merit its price. Later that day, Williams shows the print to Binks (John Hopkins), a colleague he plays golf with. He comments that the moonlight is quite well done and there appears to be a figure just on the right of the image. Williams is puzzled that he hadn’t noticed it before. That evening Garwood (Robert Bathurst), a fellow academic, studies the picture and comments on a “grotesque” figure. When Williams checks again before going to bed there is now clearly a shroud covered shape crawling across the lawn in the mezzotint. Williams confers with his friends as to what they have seen, as it becomes clear that the picture is trying to show them something.