When the body of social worker Kery Jacobsen appears on the autopsy table of Dr. Laurie Montgomery, it initially seems that she is the victim of a tragic drug overdose. However, Laurie and her new resident, the smart and capable but straightforward Dr. Aria Nichols, discover something shocking during further examination. When the young woman died, she was in her tenth week of pregnancy. Yet, it seems that no one has any idea who the father could be, and whether he is the key to understanding what happened in the last hours of Kery's life. While Laurie faces a personal crisis with her husband, forensic pathologist Jack Stapleton, impulsive Aria embarks on a controversial new method to advance the case: she uses DNA databases to track down those who do not want to be found. She collaborates with genealogy experts from New York. She plans to trace the origins of the unborn child in hopes of identifying the mysterious father. A few days later, Kery's best friend is also murdered. Laurie desperately needs answers, as someone out there clearly does not want Kery's secrets to come to light... and as Aria slowly approaches the truth, she and Laurie become targets of a ruthless killer...
