Olga and Peter understand that fate again gives them a chance to reunite: Ksenia is gone, and Mongo wants a divorce. During their conversation, Alexander enters the room and, seeing them together, is finally convinced that Mongo is right: Olga and Peter are lovers! A carriage with D'Arnie and Xenia rushes from St. Petersburg. The fright has passed, and Ksenia frantically comes up with an escape plan. Elizaveta tries to seduce Okhotnikov, but he realizes that he will only be a toy in her hands.

Peter tells his mother that he is starting a new life: he is free from all obligations, the emperor has alienated him from himself, and the bride has run away. He goes to Olga to offer her to be together again. Olga informs Peter of her pregnancy. It is the child who keeps her from a rash step and she decides to stay with Mongo-Stolypin. Elizabeth begins to secretly meet with Okhotnikov.

Olga is surprised to see Mongo and Peter together. To relieve tension, Mongo pours wine on her as well. He changes his mind about killing Peter. Varya tries to find out from Lugin the truth about the murder of Lenchen. Lugin, realizing what is the matter, warns Varya - Konstantin is a dangerous person. Constantine is playing his game. He admires Varya and invites her to become Elizabeth's maid of honor.

Having become a lady-in-waiting, Varya soon notices a dismissive attitude towards herself on the part of the Empress and her entourage. Varya decides to talk to Elizabeth because Constantine deliberately ruined her reputation. Lugin, having learned from Constantine that Varya is his mistress, challenges the Grand Duke to a duel. At Kuragin's evening, Mongo-Stolypin invites Peter to the card table.

Deciding to leave St. Petersburg, Peter comes to say goodbye to Evdokia, but Kuragin does not let him on the threshold. Olga realizes that Mongo destroyed everything that was between them. She decides on an impulsive act... Olga runs away from her husband. At the post station, she meets Lugin. He offers her his help. Okhotnikov says goodbye to Elizabeth and leaves St. Petersburg. Elizabeth saves Varya from the claims of Grand Duke Constantine. D'Arny brings Xenia to the outskirts of Paris.

Eudoxia knows that her son has not died, but has gone on a secret mission to France. After leaving his unit, Tolstoy finds Varya in Elizabeth's chambers. Varya admits that she is a prisoner of Constantine. Alexander invites Tolstoy to his house and informs him that Peter is alive and in France on his instructions. The purpose of Peter's mission is to obtain Napoleon's secret correspondence with the Austrian court. Alexander instructs Tolstoy to take Peter a package for Napoleon.

Olga brings the wounded Lugin to Spartacus' house. D' Arnie arranges a "check" on Xenia and finds out that the girl does not remember anything. Tolstoy comes to Vara to say goodbye: he leaves, but cannot take her with him. Konstantin takes Varya to his country house and begins to describe the charms of their future life together. Suddenly, Tolstoy breaks into the house of the Grand Duke, and a fight ensues. Tolstoy manages to escape with Varya.

Olga begs Lugin to flee Spartacus' house. Spartacus finds Xenia in a secret room and realizes that she knows the secret of Peter and D' Arnie. He admits that Ksenia's child is alive, and he plans to raise a superman from a baby. After putting the young woman to sleep, Spartacus informs Charles that he will feed the baby with synthesized milk.

Sibari comes to Olga's prison cell and she asks for his help. Soon, the young woman is released and brought with the child to Sibari's house. Pauline invites Peter to a masquerade in Sainte-Cloud. Meanwhile, Varya begins to suspect the true reason for Tolstoy's arrival in France. In his belongings, she finds a package with the imperial seal. Having met with Tolstoy, Peter asks him to attend a ball - a masquerade.

Sibari persuades Olga to accompany him to a masquerade in Saint-Cloud. Varya decides to follow Tolstoy and, dressed in a man's dress, follows him. But suddenly, Tolstoy disappears from her sight. In the secret room, he meets peter. Everything is ready, friends discuss the last details of the operation. Lugin and Spartacus devise a plan to assassinate Napoleon.

Taking advantage of the general bustle of the ball, Peter eludes Josephine. Tolstoy, seeing Varya in the crowd, leaves Polina and rushes after her. Sibari jealously watches Olga and Napoleon's conversation. Lugin, holding a dagger at the ready, keeps a close eye on the emperor talking to his wife. Josephine asks Napoleon to beware of Peter: he behaves very suspiciously... Xenia and D'Arnie are preparing to fulfill their master's task.

Olga refuses Sibari but asks to save the child, who is with Spartacus. Finding Mongo in Spartacus' house, Sibari realizes that Olga is his wife. Napoleon, who found Peter and Josephine in his office, demands an explanation. Peter decides to go all in. But Napoleon is amused by his confession. Returning to the masquerade, Peter notices D'Arnie and Xenia among the dancers.

On the street, Peter meets Ksenia and realizes that she really does not remember anything about her past. During a conversation with the Duke of Enghien, D'Arny invites him to lead the conspiracy. Constantine, on the instructions of Napoleon, comes to Sibari to pick up Olga and deliver her to the palace... Tolstoy and Lugin quarrel over Vari. At this time, an agent of Grand Duke Constantine brings her a letter. Young people decide to ask about its contents.

Peter intends to find out why Ksenia lost her memory and where their child is. Sibari informs Olga that her husband is rumored to be dead. Josephine appears at Sibari's house. She suspects that Olga is another mistress of Napoleon... D'Arnie introduces Xenia to the Duke of Enghien, introducing her as his sister. Ksenia asks him out on a date and leads him to the other side of the river, where the border with France passes. The Duke falls into the hands of Anatole's agents, notified by D'Arny.

Peter informs Xenia that the man she considers her husband is a murderer. Back home, Xenia tries to gently question D'Arnie. He forbids her to see Peter. Olga learns from a maid that Sibari had a conversation with Napoleon. Having decided to leave, she goes to church for confession... Varya becomes a prisoner of Spartacus. Xenia comes to Peter. His apartment is a mess: someone searched the house.

The stranger's face, who has fallen from the gunshot, rips off the hood. Olga tries to approach the wounded man, but she is intercepted by Constant. On behalf of Napoleon, he forcibly takes the girl to Saint-Cloud. Xenia, taking up arms, stands up for Peter. Napoleon again unsuccessfully tries to seduce Olga, he even decides to use force. But at the decisive moment, Josephine enters... Constant takes Olga to Sibari's house and puts a guard on her. Sibari proceeds to interrogate the Duke of Enghien.

Sitting under house arrest, Olga tries to escape. Mongo and Varya maintain a presence of mind and seek escape from the labyrinth. Xenia asks D'Arnie to talk about his past. D'Arnie, to his horror, remembers nothing. He asks about his childhood Spartacus, who raised him. Spartacus swears that he did not conduct experiments on D'Arny's memory and reports on its origin

Peter manages to arrange a secret meeting between Alexander and Napoleon, of which not even D'Arny knows. They quickly reach an understanding, and Napoleon invites Alexander to a ball in Saint-Cloud in the evening. Alexander, pleased with the meeting, expresses his gratitude to Peter. Varya and Anna Antonovna come to Olga and bring her the child Ksenia. Mongo asks them not to reveal his presence. Olga, busy thinking about her fate and the fate of the child, agrees to a meeting with Napoleon.

Napoleon signs an order pardoning the Duke of Enghien. Josephine hands the paper to Peter. Mongo reappears at Sibari's house. From Anna Antonovna, he learns that Olga has gone to the palace and is in a hurry for her. There is a fire in Spartacus' house. Varya suggests that Lugin wait until the wooden one burns out and get free. Olga tells Napoleon that she has not changed her mind: her consent to the meeting is the only way to get out of prison and talk to him.

Peter and Olga, having understood each other without words, leave the hall. They are followed by Mongo. Tolstoy lures Varya out for an evening walk and confesses his love to her. D'Arnie finds Xenia in Peter's rented apartment. She still considers D'Arnie her husband Klaus but announces to him that she loves Peter. In addition, Xenia shows D'Arny Spartacus' diary, from which D'Arnie learns that he and Pyotr Cherkasov are brothers. Napoleon gives the order to shoot the Duke of Enghien.