While in Paris, Harvard Symbologist Robert Langdon is awakened by the phone call in the dead of the night. The elderly curator of the louvre has been murdered inside the museum, his body and the floor around him covered in baffling symbols. As Langdon and a gifted French cryptologyst, Sophie Neveu, sort through the bizzare riddles, they are stunned to discover a trail of clues visible for all to see and yet ingeniously disguised by the painter.