New York Times bestselling author James Rollins brings back SIGMA Force to battle a group of rogue scientists who've unleashed a bioengineering project that could bring about the extinction of humankind.

In Washington D.C., a homeless man dies in Commander Gray Pierce's arms, shot by an assassin's bullet. But the death leaves behind a greater mystery: a bloody coin found clutched in the dead man's hand, an ancient relic that traces back to the Greek Oracle of Delphi. As ruthless hunters search for the stolen artifact, Pierce discovers the coin is the key to unlocking a plot that threatens the very foundation of humanity. For an international think-tank of scientists has discovered a way to bioengineer autistic child who show savant talents into something far greater and far more frightening—all in hopes of creating a world prophet for the new millennium, one to be manipulated to create a new era of global peace...a peace on their own terms.

From ancient Greek temples to glittering mausoleums, from the slums of India to the radioactive ruins of Russia, two men must race against time to solve a mystery that dates back to the first famous oracle of history—the Greek Oracle of Delphi. But one question remains: will the past be enough to save the future?