In 1925, Nan O'Dea infiltrated the wealthy world of Agatha Christie and her husband, Archie. Gradually, she became a part of their life--and then Archie's mistress, luring him away from his wife. Based on true events, Nina de Gramont's novel revisits Nan's youth in Ireland, and her passionate courtship with a soldier--until the Great War, a pandemic, and shameful secrets tore them apart. Finding happiness again with Archie Christie, however, Nan may find herself at the center of a murder mystery that is all too real.