When the body of twenty-eight-year-old social worker Kera Jacobsen shows up on Chief New York City Medical Examiner Laurie Montgomery's autopsy table, at first it appears she was the victim of a tragic yet routine drug overdose. Kera's family and friends swear she never touched drugs. And although Kera was ten weeks pregnant, nobody seems to know who the father was--or whether he holds the key to Kera's final moments alive. As a medical emergency temporarily sidelines Laurie, pathology resident Aria turns to a controversial new technique: using genealogic DNA databases to track down those who don't want to be found. Working with experts at a start-up ancestry website, she plans to trace the fetus's DNA back to likely male relatives in the hopes of identifying the mystery father. But when Kera's closest friend and fellow social worker is murdered, the need for answers becomes even more urgent.
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