True-crime writer Jack Pemberton has a connection to Charlie Harris's family, and he wants Charlie as the subject of his latest book. Meanwhile Charlie is spending time helping an elderly man navigate the library's genealogical database. But he's shocked when he learns that the visitor's search is focused on a member of his own family: his late aunt's husband. A shocking homicide took place years ago in a small town near Athena, Mississippi. And as this cold case heats up, Charlie and his Maine Coon cat, Diesel. have to uncover a killer who may already be too close to home.