A murder inside the Louvre, and clues in Da Vinci paintings, lead to the discovery of a religious mystery protected by a secret society for two thousand years, which could shake the foundations of Christianity.

A young priest is sent to Rome to investigate the troubling death of the head of his order.

A young man in a personal tailspin flees from US to Italy, where he sparks up a romance with a woman harboring a dark, primordial secret.