An earthquake in Masada, Israel, kills hundreds and reveals a tomb buried in the heart of the mountain. A trio of investigators: Sergeant Jordan Stone, a military forensic expert; Father Rhun Korza, a Vatican priest; and Dr. Erin Granger, a brilliant but disillusioned archaeologist are sent to explore the macabre discovery, a subterranean temple holding the crucified body of a mummified girl. But a brutal attack at the site sets the three on the run....

As a scourge of grisly murders sweeps the globe, Erin Granger must decipher the truth behind an immortal prophecy foretold in the Blood Gospel, a tome written by Christ and lost for centuries. Erin must again join with Army Sergeant Jordan Stone and Father Rhun Korza to search for the lost treasure. But it has already fallen into the hands of a demon named Legion, before whom even the walls of the Vatican will fall.