The Davinci Code

What's been happening in the book I'm reading, the Davinci Code, is Sophie Neuveu, an agent in cryptology, left a message for Langdon telling him he was in grave danger and to meet her in the bathroom and to make sure Fache didn't follow him. He did what he was told and met her in the bathroom where she told him that Fache thought he was the one that murdered Sauniere and that they had to break out of the Louvre and get him to the Embassy, where he could have a fair American trial, if he got to the embassy he was considered on American ground where he would be safe for the time being. They were following Robert Langdon with a tiny tracking device to make sure he didn't try to make a run for it. They put the dot in a bar of soap and and broke the glass, immediately the sirens started to blare and they threw the soap onto a passing truck. Fache called for all the agents to follow the truck giving Langdon and Sophie time to escape. When they were about to escape Langdon figured out the code Sauniere had left which said:

Leonardo Da Vinci!
The Mona Lisa!

They figured they had enough time to go take a look before Fache got back so they went back to look for clues on the Mona Lisa. Written across the paintings protective glass, there was another puzzle that led to another painting. Before she could figure it out though, a security guard came in and told Langdon to put his hands up and get on the ground. As all of this was going on, Sophie managed to get to the painting and found a key that earlier in her life, Saunier (her grandpa) had told her unlocked unbelievable secrets. She pocketed it then turned and used the painting as a hostage, she told the security guard that if he didn't drop his walkie talkie and gun, she would smash her knee through the famous Da Vinci painting, horrified, he dropped his gun and radio and as they ran out of the room they took them. They left the museum and got in Sophie's Smart Car. The cops saw them but they managed to loose them in the maze of streets. Now they're trying to find a safe place where they can try to find out what the key will unlock.