Julia and Valentina Poole are American twenty-year-olds whose attachment to one another is intense. Their aunt, Elspeth Noblin, has died of cancer and left them her London apartment under two conditions: that they live in it for a year before they sell it and that their parents not enter it. Julia and Valentina are twins. So were the estranged Elspeth and Edie, their mother. The girls move to Elspeth's flat, which borders Highgate Cemetery. As the...