The story is about Tom Hanks and Audrey Tautou stumbling upon an encoded dark secret and going on a treasure hunt to solve it. Tom Hanks is a renowned author on interpreting symbols while Audrey Tautou is a cryptology expert from the police whose grandfather was murdered.
The puzzles are interesting but it is almost impossible for the audience to solve without any background knowledge so didn't have the opportunity to try to beat the characters in solving them. A lot of screen time is devoted to explain this background knowledge and resulted in too much information overload. Not as exciting as "National Treasure" in terms of the clue solving or "M:I:III" in terms of action sequences. Nice indoor scenery of the churches and the museum though!
Internet Movie Database Link