Based on the 2003 novel. Robert Langdon, a professor of religious iconography and symbology from Harvard University is the prime suspect in the grisly and unusual murder of Louvre curator Jacques Saunière. He escapes with the assistance of a police cryptologist, Sophie Neveu, and they are embroiled in a quest for the legendary Holy Grail. He is pursued by a dogged French police captain, Bezu Fache. A noted British Grail historian, Sir Leigh Teabing, tells them the actual Holy Grail is explicitly encoded in Leonardo Da Vinci's wall painting, the Last Supper. Also searching for the Grail is a secret cabal within Opus Dei, an actual prelature of the Holy See, who wishes to keep the true Grail a secret; the revelation of this secret would certainly destroy Christianity.