The movie ends with the revelation that Sophie Neveu is Jesus' only living direct descendant.But Langdon doesn't find Saunière's trail of clues until after Fache summons him to the Louvre-so Aringarosa shouldn't have any reason to be concerned about him finding out about the conspiracy. If Aringarosa was really the one who convinced Fache to pin the murder on Langdon, he'd have to have called him (at most) within a few hours of Saunière's death.

But as the movie clearly shows: Fache already suspected Langdon of murdering Saunière on the night of the murder, when he discovered that Saunière wrote his name on the floor of the Louvre. In the movie, Fache is a member of Opus Dei, and it's ultimately revealed that Bishop Aringarosa is using him as a pawn to stop Langdon from exposing the truth about Jesus' bloodline (Fache suspects Langdon because Aringarosa falsely claimed that Langdon came to him in confession and admitted to being a killer). In the book, Bezu Fache is just a really persistent detective who also happens to be a devout Catholic, and he tries to arrest Langdon because he genuinely believes that he murdered Jacques Saunière.Except.even if someone managed to get samples of Mary Magdalene's DNA from her tomb, no one could prove that Jesus fathered her children unless they also had DNA samples from Jesus himself. In the movie, it's made explicit that there actually is a secret group within the Vatican called 'The Council of Shadows' that actively wants to find and destroy Mary Magdalene's tomb, and they're particularly concerned about the possibility of someone using 'DNA identification' to prove that Mary Magdalene was the mother of Jesus' children. In the book, several characters discuss the possibility of the Church trying to hide evidence of Jesus having living descendants, but it's left ambiguous whether any of this is actually true, and the head of Opus Dei is ultimately revealed to be a pawn of ' The Teacher' who just wants to keep Opus Dei afloat.Adaptation-Induced Plot Hole: The 2006 movie has several story issues that weren't present in the book.

Da vinci code movie synopsis