To rescue kidnapped Tess Chaykin, FBI agent Sean Reilly infiltrates the Pope's massive Vatican Secret Archives of the Inquisition in search of a document known as the Fondo Templari, a secret history of the infamous Templars.
When the opening gala of a Vatican exhibit attended by archaeologist Tess Chaykin is stormed by four horsemen dressed as Templar Knights who steal an artifact, FBI anti-terrorist specialist Sean Reilly and Tess team up for an investigation.