The Louvre, Paris: the elderly curator of the museum has been violently murdered in the Grand Gallery. Harvard professor Robert Langdon is summoned to decipher the baffling codes which the police find alongside the body. As he and a gifted French cryptologist, Sophie Neveu, sort through the bizarre riddles, they are stunned to find a trail that leads to the works of Leonardo Da Vinci - and suggests the answer to an age-old mystery that stretches deep into the vault of history.