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-Silas visits Saint Suplice
-the Sister is highly suspicious of him, she watches his actions from the shadows of the church
-Langdon figures out Sauniere's message was actually an anagram that said Leonardo di Vinci, The Mona Lisa
-Sophie tells Langdon to go back, take her car and go to the embassy
-Langdon realizes P.S. also meant Priory of Scion, and goes back to Sophie
-Silas looks at the Rose Line (the first zero latitude) and finds the spot where the keepers of the keystone told him lies the keystone
-Fache and company find the GPS dot in the bar of soap
-Fache calls the American embassy to find out no one had left a message for Langdon, checks his phone history and discovers Sophie helped Langdon escape
-Silas takes a candle stand, wraps it around his robe and prepares to destroy the floor tile which was hollow
-Fache sends half his men back to the Louvre and half to the American embassy
-The message they find on the Mona Lisa: So dark the con of man
-The warden of the museum takes Langdon into custody while Sophie hides
-Silas finds a stone tablet referencing a verse from the book of Job. The verse says: "Hitherto shalt come, but no further."
-at this point, Sister Sandrine runs and starts phoning the 4 brothers of scion, as she is the sentry for them
-Claude Grouard, the warden, holds Langdon captive, while Sophie searches Madonna of the Rocks, as "so dark the con of man" is another anagram for Madonna of the Rocks. She eventually finds a key decorated with the fleur de lis and P.S.
-Sophie holds the Madonna of the Rocks as her shield and forces the warden to comply as he puts down his gun and lets Langdon go
-Sister Sandrine calls all the numbers but finds that they are dead. As she is calling the 4th number and leaving a message, Silas comes in, demands where the keystone is. When she tells him she doesn't know, Silas bludgeons her with the candle stand and she dies
-Sophie and Langdon escape in her smartcar, heading to the embassy
-they realize the embassy is blocked off by the police; as they turn around the police notice and follow in pursuit
-Throughout the car ride, Sophie recalls a very weird ceremony she witnessed at her grandfather's house when she was younger, which made her cut all forms of communication from him for 10 years
-Sophie shows Langdon the key, and they try to figure it out
-They stop at the train station and buy tickets to the next train out of Paris
-Bishop Aringarosa arrives in Rome and heads to Castel Gandolfo, the Pope's summer residence
-Aringarosa believes science and religion cannot co-exist
-He recalls the terrible truth revealed to him at the meeting at Castel Gandolfo 5 months ago
-Sophie and Langdon get on a taxi, where they find an address on the key, and they head towards the address
-Fache calls in Interpol
-In the taxi, Langdon tells Sophie the Priory guards the secret of the Holy Grail
-The taxi driver wants to turn them in; Sophie holds him by gunpoint and Langdon drives the taxi stick shift with difficulty away
-Silas sits in his room, devastated because he killed all the brothers but still did not find the keystone
-Langdon and Sophie now converse about the history of the Grail
-They reach the address on the key; it is a Swiss bank
-Bishop Aringarosa arrives at Castel Gandolfo to receive bank bonds from the Vatican City's secretary and 2 other high rank cardinals
-Langdon and Sophie enter the bank using the key to get through the gates and etc.
-They meet a stationed guard, who tells them to go down the elevator to the vault. After they leave, the guard informs Interpol and the bank president, Andre Vernet.
-Langdon and Sophie realize they need an account number to access the vault
-Fache sends his men after Langdon and Sophie
-After Vernet learns of the situation, he tries to alleviate the situation because he does not want his bank's name out in the public as Langdon and Sophie are high profile suspects
-Vernet was a good friend of Sauniere
-Sophie wants the account number but Vernet tells them only the client knows the account number to ensure safety of the employees
-Langdon realizes the account number is the Fibonacci Sequence
-The duo retrieve a rosewood box with a rose inlaid on the cover