When his editor asks him to investigate the background of Simone Anderson, a new Bloomsbury artist, journalist Harry Fitzglen is skeptical. But once he’s met the enigmatic Simone, Harry is intrigued. What happened to Simone’s twin sister who disappeared without trace? And what is the Anderson sisters’ connection to another set of twin girls, Viola and Sorrel Quinton, born in London a century before? All Harry’s lines of inquiry seem to lead to the small Shropshire village of Weston Fferna and the imposing ruin of Mortmain House, standing grim and forbidding on the Welsh borders. As Harry delves into the terrible history of Mortmain, he finds himself drawn into a series of interlocking mysteries, each one more puzzling—and sinister—than the last.