An attack at a ranch in California thrusts archaeologist Erin Granger back into the fold of the Sanguines, an immortal order founded on the blood of Christ and tasked with protecting the world from the beasts haunting its shadows. Following the prophetic words found in the Blood Gospel, a tome written by Christ and lost for centuries, Erin must join forces with Army Sergeant Jordan Stone and Father Rhun Korza to find and protect a boy believed to be an angel. But an enemy of immense power and terrifying ambition seeks the same child - not to save the world, but to hasten its destruction. For any hope of victory, Erin must discover the truth behind Christ's early years and understand His first true miracle, an event wrapped in sin and destruction that holds the only hope for the world. Her search will take Erin and the others across centuries and around the world, from the Holy Land to the Arctic Ocean, from the catacombs of Rome to an iron fortress in the Mediterranean Sea, and to the very gates of Hell itself, where their destiny, and the fate of mankind, awaits.