A dedicated Pinkerton agent, Sarah Margaret "Yancey" Calhoun can't ignore an impassioned summons from the Dowager Duchess of Somerset, who believes Yancey is her son's estranged wife. Nothing could be further from the truth. But another woman named Sarah Calhoun has been murdered in Chicago. And Yancey could be next. Traveling to England alone is hardly intimidating for a woman who works undercover. But when Yancey arrives at the remote country estate...