Historian Aldo Lombardi is a recent graduate of the Pontifical Gregorian University summoned to appear before Pope Benedict. Allison Gillespie is an investigator whose assignment leads her to Aldo and a 500-year-old secret whose discovery may unravel the very fabric of the Christian faith. The pair must uncover the truth behind the secret and reveal what the leaders of the modern Seventh-day Adventist Church know that could destroy the Catholic Church.