At the end of the 19th century, the Priest of Rennes-le-Chateau, Berenger Sauniere mysteriously and suddenly became fabulously rich. Rumours spread the priest had discovered buried treasure, but others claim Sauniere had uncovered a secret so profound, it could rock the foundations of the Catholic Church; evidence of a bloodline of Christ, the Holy Grail. Sauniere’s housekeeper, confidante and later lover, Marie Denarnaud was the only person who knew the truth, which she was going to reveal on her deathbed. However, she had a stroke and could not speak, leading many to this day to question what the truth is. Had the cup of Christ really been discovered?