Symbologist Robert Langdon and Sophie Neveu were called up to investigate this murder, Sauniere who died in the prologue was Sophie’s grandfather. The men arrive at the scene of the murder to find the body with a series of symbols and codes. Langdon received warning about Officer Fiche who was supposed to help solve the murder mystery. Sophie has with her a kind of key with dots and number 24 engraved on it, which opens to her and Langdon a big complex investigation that involves a supposedly heretic theory: Jesus Christ and Mary Magdalene were, in fact, a couple who produced a daughter named Sara. A millenarian sect called The Priory of Sion has kept for centuries the secret of that matter. A masochist and kind of psychopath albino monk, Sibilas, an Opus Dei member (a clandestine,