In the depths of an unmapped cave, forensic anthropologist Diane Fallon makes an astonishing discovery: a decades-old skeleton. Soon, the remains of two more bodies are found-one in an old car submerged in the waters of an abandoned quarry, another buried in the Georgia woods. With nothing to link the victims except desiccated bones, Diane can't figure the connection. But someone in the shadows does. It's the key to a mystery that reaches back 70 years to an unearthed family secret that still holds the power to kill.