Deep within a jungle, ancient ruins conceal a deadly secret . . . In a tomb in Venice, a great explorer hides a truth that could shatter history . . . In our own genetic code lies a mystery like no other . . . From the high seas of the Indian Ocean to the dark jungles of Southeast Asia, from the canals of Venice to the crypts of ancient kings, Sigma Force must piece together a mystery that threatens to end all life on our planet—a mystery that goes back centuries in time. But even this challenge may prove too large for the elite members of Sigma Force alone. With a worldwide pandemic growing, Painter Crowe and Commander Gray Pierce turn to a diabolical foe who thwarted them in the past. But is this enemy trustworthy . . . or another Judas?