A remote military research station in Utah sends out a frantic distress call, ending with a chilling final command: Kill us all! Personnel from the neighbouring base rush in to discover everyone already dead - and not just the scientists, but every living thing for fifty square miles has been annihilated. The land is entirely sterile-and the blight is spreading. To halt the inevitable, Commander Gray Pierce and Sigma must unravel a threat that rises...

Commander Gray Pierce and Sigma Force set out to uncover the truth tied to the fall of the Roman Empire, to a mystery going back to the birth of Christianity, and to a weapon hidden for centuries that holds the fate of humanity.