"I had noticed something disturbing. In the row of five first-floor windows, there was a blank. The window above the door had been roughly bricked up and painted black. Just wondering what lay behind it made me weak at the knees." When Con sees a photograph of Weerdwood, a mansion house in North-East Scotland, she begins to dream vividly - dreams of summer and a house full of music and laughter. But, arriving in March for a working holiday, Con finds Weerdwood deeply sinister.