An archeological team discovered a mysterious relic clutched in the skeletal hands of an old woman at the floor of the Mediterranean Sea. The ship never made it to shore. Years later, two children were abducted from their bedrooms on opposite sides of Washington, DC. A note left behind detailed the torture of their abductor and invited the FBI into a game for their safe return. This note led the investigators to two serial killers, one incarcerated and one not. A terrifying, millennia-old mystery has come to the surface, and a woman, shrouded in evil, has become the mastermind of all their worst nightmares.