: Investigation into the murder of an employee of the Louvre reveals many secrets related to Mary Magdalene.

Late in the Louvre, the curator Jacques Sauniere is murdered, whose body is disfigured by strange signs. The police believe that the victim killed himself so. His killer, Silas, calls a certain Teacher and reports that the four people who told him the same information before his death were removed. A certain brotherhood created the cornerstone on which it is encrypted with signs, where the secret of this brotherhood is kept. All four killed showed that the card is in the Paris church of Saint-Sulpice. The teacher urgently needs to get this card.

Police seek help from Robert Langdon, professor of religious symbolism at Harvard University. Never knowing Langdon before, Sauniere made an appointment with the professor who had arrived in Paris the day before.

Bishop Aringarosa, father-chairman of the Opus Dei fraternity, flies from New York to Rome. Recently, a special group has been monitoring the fraternity, as some of its members have been seen in unseemly acts, but the fraternity is under the auspices of the Vatican. Recently, some members of the fraternity have been attacked. Aringarosa receives the news that Silas has found the cornerstone.

Langdon is brought to the Louvre at the crime scene. According to police, Sauniere was in his office when he was attacked. He ran out to the gallery and turned on the alarm, ripping the picture off the wall. The entrance to the gallery was blocked by a descending grate, and the killer shot at the curator through it. Sauniere crawled quite a long distance and died. The police found him naked, lying on his back with arms and legs outstretched. In the center of the abdomen was drawn a five-pointed star - pentacle. In the darkness, purple letters and numbers were visible next to the corpse. The killer disappeared without a trace.

The sister of the church of Saint Sulpice Sandrine meets the representative of Opus Dei who has arrived in Paris.

Trying to decipher what was written, Langdon comes to the conclusion that Sauniere, with his pose, copied the famous painting by Leonardo da Vinci “The Vitruvian Man”.

The lead investigator, Captain Bezu Fache, transmits the images with signs to the cryptography department, and the cryptographer Sophie Nieuve from the judicial police arrives at the crime scene. She informs Langdon that he is in danger.

Aringarosa meets with Silas, to whom he once saved his life, and with Teacher.

Sophie tells Fache that a set of numbers is a Fibonacci sequence. Improving the moment, she meets in private with Langdon and tells him that he is the first suspect in the murder, so a special tracking beacon was put in his pocket. In addition to the secret signs written near the body, there was an inscription that Fache erased: Sauniere asked to find Langdon. The inscription was not intended for the police, but for her, since she is the granddaughter of Sauniere.

Sophie was left an orphan at four. Her parents, grandmother and younger brother died in a car accident, and her grandfather raised the girl. Ten years ago, when she returned home without warning, she found her grandfather in the company of strange people who worship some object and perform strange rites. Sophie broke up with him. Since then, they have not seen each other, although her grandfather asked her to meet.

With the help of Sophie, Langdon manages to escape from the Louvre. After carefully reading the entry, Langdon concludes that this is an anagram of the words “Leonardo da Vinci Mona Lisa”, and the Fibonacci sequence is a cipher.

Sophie is left alone in the Louvre. She wants to find "Mona Lisa" and find out what kind of mysterious message her grandfather left.

Silas comes to the church of Saint-Sulpice. He asks Sister Sandrine to leave him alone to pray. Hiding, Sister Sandrine watches him.

Sophie comes to the crime scene.Langdon does not run away, but returns to her. Thinking, he concludes that the inscription next to the deceased was encrypted with a symbol of a secret society that Sophie had once seen with her grandfather. Having examined the glass in the painting "Mona Lisa", they see the inscription in blood - one of the fundamental principles of the fraternity.

Sophie examines another painting by Leonardo da Vinci "Madonna in the Grotto." There she finds an unusually shaped key, which she once saw in her grandfather's childhood, and which should open a box with many secrets. On the key they see the address.

Langdon is arrested by the Louvre security agent, but Sophie rescues him.

Silas, thinking that he is alone in the church, pulls out a Bible from the cache to find out where the cornerstone is. Sister Sandrine calls the connected members of the fraternity and finds out that they are all killed.

Sophie and Langdon run away from the police. Langdon talks about the Priory of Zion fraternity, whose seal marks the key. The Templars handed over to the fraternity important secret documents brought from Jerusalem to Europe, in which they are talking about the Holy Grail.

Finding nothing, Silas kills Sister Sandrine.

Aringarosa receives a large sum from the Vatican.

The address indicated on the key is a Swiss bank. Sophie and Langdon find a safe, but do not know the account number. The president of the bank branch, Andre, knows that they are suspected of murder, their images are already distributed by Interpol. Sophie tells him what happened. The police following them arrive at the bank. Berne agrees to help hide, he does not need problems in the bank, and Sauniere was his friend. Langdon recalls the inscription near the body of the deceased - this is the account number.

In the safe there is a box with the symbol of the Priory of Zion on the lid. Taking the box with him, Berne takes the fugitives out of the bank unnoticed.

Silas repents to Teacher that he did not complete the task, but he reassures him: he knows to whom Sauniere passed the information.

Inside the casket is a cryptex, a cylinder with disks. Cryptex invented Leonardo da Vinci, but Sauniere liked to carve such things out of wood. After thinking about and learning from Sophie about the rite that she saw in her childhood, Langdon concludes that Sauniere was one of the highest members of the society who was entrusted with the secret, and the cryptex indicates where the Grail is located. There should be three more people who were privy to secret, apparently Sauniere felt some danger if he wanted to entrust the secret to his granddaughter and him.

Hearing on the radio that Sophie and Langdon are accused of killing three more people, Berne demands that they give back what Sauniere entrusted to him to guard. Sophie and Langdon run away, leaving Bern alone in the forest. Langdon realizes that a traitor has entered the fraternity. He decides to turn to an outstanding scientist, Lew Teabing, who is studying the Grail. Teabing will be interested in Critpex and will not give them to the police.

After listening to Sophie with Langdon, Teabing shows them the picture of Leonardo da Vinci's Last Supper. Each of the thirteen participants in the supper has its own cup, but the Bible and other legends believe that the Grail came here. Teabing believes that the Grail is not an object, but a man, and a woman, since the symbol of the feminine is a vessel. This woman is depicted in the picture, and she is Mary Magdalene.

According to various documents and the ancient Dead Sea scrolls, there was a romantic relationship between Jesus and Mary Magdalene, they were spouses. Blood in the grail is the child of Jesus worn by Mary Magdalene. The church hid this fact and declared Mary Magdalene a harlot, which was not true.

To save the child, Mary fled to France and gave birth to a girl Sarah. Documents about the life of Jesus, Mary and Sarah were hidden and found by the Templars. The search for the Holy Grail is the search for the grave of Mary Magdalene.

The clan of Jesus developed, connected with the clan of the French kings and founded Paris.

Teabing's servant Remy informs the landlord that Langdon and Sophie are wanted by the police.So that Teabing would not hand them over to the authorities, Langdon shows him the cryptex. This is seen by Silas sneaking under his window. Meanwhile, police are driving up to Teabing's house.

Upon reflection, Teabing, Sophie and Langdon come to the conclusion that Sauniere passed on the secret of Sophie’s brotherhood, since the others who knew her were killed. The killer must be sent by the Church.

Teabing is studying the cryptex, while Langdon is in the other room looking at the box. In it he finds a piece of wood with an inscription in a language unknown to him, but here Silas hits him in the back of the head. Threatening Sophie and Teabing with a gun, Silas demands to give him the cryptex. Teabing knocks out a gun from him.

Police rush into Teabing's house, but Teabing, Remy, Sophie, and Landox take Silas and manage to escape. It is not clear to Langdon how Silas could find them.

Teabing offers everyone to fly to England on his plane. After thinking about the cryptex, the fugitives decide that it is necessary to find the grave of the Templars, and the encrypted word is Sofia. In the cryptex is another cryptex, along with a note stating that you need to find the grave of the knight buried by the Pope in London and take the ball there.

Upon hearing the news, Aringarosa realizes what he involved Silas in, and decides to fly to London.

Having tricked the English police, Teabing together with Langdon, Sophie, Remy and Silas go to the grave of the knight in the church where the Templars are buried. While Teabing with Sophie and Langdon are in the church, Remy, who works for Teacher and expects to receive a large sum, frees Silas. Silas bursts into the church with a gun, demanding that he be given the cornerstone. Langdon threatens to break the cryptex. Then Remy puts the gun to Teabing's temple, and Langdon gives the cryptex back. Remy takes Teabing away and lets go of Sophie with Langdon.

In Teabing's house, the police raids. It turns out that his servant Remy was once involved in petty thefts. The police also detect a listening system for people.

Sophie reports to the police about Teabing's abduction. Captain Fache is talking to her from France. He apologizes for the charges and wants to meet with the fugitives.

Teacher calls Silas and asks Remy to bring him a stone at the Opus Dei residence.

At the Royal Library Research Center, Sophie meets Langdon with librarian Pamela Getty.

Leaving Remy with the associated Teabing in the car, Silas arrives at the residence. A Teacher comes to the car, which no one has seen before. He kills Remy by taking the critpex.

Pamela studies the documents and concludes that the knight is Isaac Newton, the Great Master of the Priory of Zion, who was cursed by the Church. Newton was buried in Westminster Abbey by the philosopher Alexander Pop, whose name and the word "Papa" are spelled the same.

Silas is being arrested at the Opus Dei residence. During the detention, he renders resistance and accidentally injures Bishop Arangaros.

Sophie and Langdon, worrying about Teabing, come to Newton’s grave. They are seen by a hidden Master. Sophie and Langdon see an inscription on a tombstone that tells where Teabing is located.

In the indicated place, they find Teabing's pistol aiming at them. This is the Teacher who organized the assassination of Sauniere, the Sophie family and other people so that no one would know the secret of the Grail. Teabing staged a conversation with Remy and Silas, tricking them. Now he wants to take over the secret of cryptex.

Silas drags a wounded bishop to be helped. A few months ago, Aringaros was suggested that the Opus Dei come out of the custody of the Vatican. When the bishop refused, he was called by a certain Teacher and offered to assist in the search for a sacred relic. The bishop regrets having ordered Silas to obey Master.

Trying to outsmart each other, Teabing and Langdon figure out what the ball on the grave means - an apple. But then the police arrest Teabing.

Silas dies of his wounds.

Langdon and Sophie come to Scotland, to the church, which indicates the last entry in the cryptex.There they meet a woman who has exactly the same box. The woman turns out to be Sophie's grandmother, who for many years lives under a different name. Sophie's younger brother lives with her grandmother. Grandmother and brother did not drive in the car then and after what happened were forced to hide.

Sophie has acquired a family, and Langdon must leave. They agree to meet soon in Florence.