Nell Sackett is very good at being other people. It is the only skill she has left. When an elite dementia-care community hires her to impersonate a billionaire's dead wife, she takes the job to uncover what happened to her sister, the actress who played the role before her. But Fairhaven has been documenting Nell since before she arrived, and the woman in Cottage Six has been trying to warn her for six years. In a place where reality is a service and every kindness leaves a paper trail, the most dangerous person is the one holding the pen.