The strength of Sophie’s faith in Langdon’s innocence is slightly puzzling, but it might simply be a reflection of her good instincts. The dynamic between Sophie and Langdon will be one of the driving interpersonal forces of the novel as both of them embark on a mission of discovery. If Sophie is right that Saunière wrote the code and message in order to bring her and Langdon together, it must be because Saunière thought that together the pair could uncover his secret.