Murder at the Louvre - Harvard symbologist Robert Langdon stumbles upon the body of Louvre curator Jacques Saunière, encoded with cryptic symbols.
Teaming up with Sophie: Saunière's granddaughter, cryptologist Sophie Neveu, joins forces with Langdon to decipher the clues, unaware she's the key.
Trail of hidden messages: Their quest takes them through Europe, following a trail of hidden messages embedded in Da Vinci's art, like "The Mona Lisa" and "The Last Supper."
Knights Templar's legacy: They uncover a secret society, the Priory of Sion, protecting the bloodline of Jesus and Mary Magdalene, guarded by the Knights Templar.
Opus Dei's pursuit: Meanwhile, fanatical albino Silas, a member of the Catholic sect Opus Dei, chases them, believing they threaten the Church's secrets.
Codes within codes: Langdon's knowledge of symbology cracks cryptic ciphers, revealing hidden chambers and passages within historical landmarks.
The Holy Grail revealed: The truth dawns - the Holy Grail isn't a physical object, but Mary Magdalene herself, the womb that carried Jesus' lineage.
Climactic chase: Langdon and Sophie race against time, pursued by Silas, to reach Rosslyn Chapel in Scotland, the final resting place of the bloodline.
Twist in the end: Sophie discovers she's Jesus and Mary Magdalene's descendant, and Langdon helps her reunite with her long-lost grandmother.
Faith shaken, history questioned: The novel leaves readers pondering the blurred lines between truth and fiction, shaking the foundations of faith and historical interpretations.