"Temperance Brennan is grappling with her toughest challenge--how to answer police detective Andrew Ryan's marriage proposal--when the matter of matrimony is forced to take a backseat to the business of murder. Hazel 'Lucky' Strike, an amateur detective who mines the Internet for cold cases, is convinced she's solved the three-year-old mystery of a teenage girl's disappearance--and certain that the grim proof lies gathering dust in Brennan's lab....