Cold-case detective Raquel Laing faces new threats and long-buried secrets in this gripping novel from the New York Times bestselling author of the Mary Russell and Sherlock Holmes series.

SFPD Homicide Inspector Raquel Laing had what might politely be termed a "difficult childhood," until she was taken in by a loving family at the age of nine. She still lives with her adoptive sister, Dee, an online investigator for organizations all over the world.

Trouble arrives with an all-too-common case for Inspector Laing: the homicide of a drug dealer in a deserted corner of San Francisco. But the everyday rapidly spirals into complications--just as a simple search into the family's ancestry is throwing Dee into her own world of turmoil.

Raquel's case blows up far too close to home, thanks in part to the illicit shortcuts she took in the investigation, and while her unique skills are too valuable for the SFPD to suspend her entirely, she is removed from Homicide and put onto the Cold Case Unit.

On the one hand, Cold Case lets her work with her friend and mentor, Al Hawkin. On the other, it leaves her free to look at some disturbing facts about her past--and at the devastating news that Dee has uncovered in her own search for the truth.

Cold cases heat up, the distant past intrudes, and two sisters begin to suspect that they are tied together in ways they never imagined--ways that threaten attention from a powerful and vicious international cartel.

A case that proves those who are gone remain tied to those who are still here.