The episode begins with a graffiti that reads, "Fontana is a murderer," scribbled by Roberto Ronco, a neighbor whose house is connected to the villa through a series of tunnels. The Poets embark on a quest to uncover the truth behind Captain Fontana's alleged crime.
Lidia, Enrico, and Jacopo confront Roberto, a conspiracy theorist who believes in the manipulation of time and space. He shares his tragic story of Amira, a woman he fell in love with when they were the same age. According to Roberto, Fontana treated Amira like a slave and sexually assaulted her. He attempted to help her escape, only to witness Fontana's murder of her. When he reported the crime to the police, they dismissed his claims.
The local chief and Fontana's childhood friend, Piovano, provides a conflicting account, claiming that Amira had run away. He and the cook, Serafina, offer their testimony as witnesses. Enrico dismisses this as a dead-end and leaves. Jacopo, however, takes matters into his own hands and learns from Serafina that she had lied because she was having an affair that night with her lover, who is now her husband.
Lidia and Jacopo search for Amira's corpse in the villa's basement and stumble upon Piovano attempting to dispose of it. He confesses that Fontana was a licentious individual who killed Amira in a fit of jealousy after learning of her affair with Roberto. As a friend, Piovano couldn't turn him away and helped him cover it up. He then locks Lidia and Jacopo in the basement and flees. Lidia discovers a grate leading to the tunnel to Roberto's house and crawls through it. Consuelo and Enrico return to search for them in Roberto's house and rescue the two.
Once freed, Jacopo and Lidia report Piovano's confession, resulting in his arrest. Amira's corpse is laid to rest, and Roberto is relieved. Jacopo writes about Fontana's abusive tendencies, tarnishing the captain's reputation. In this way, Amira finally gets the justice she deserved.
Do Lidia and Jacopo finally get together? Jacopo doesn't accept Lidia's excuses, as if she's in love with Fourneau. Finally, she reveals that Consuelo is pregnant. He proposes, but Consuelo realizes it's out of obligation. She pushes him until he reveals that he loves Lidia. He insists that he can be happy with Consuelo, but she claims that love equates to happiness. Right before the verdict, Jacopo tells Lidia that while he'll co-parent, he and Consuelo are over. She too agrees with him that one can be in love and still be unhappy. They decide to be in love and unhappy together.
What happens to Teresa and Enrico? Teresa realizes she is not pregnant, and at her age, she may never be again. She feels afloat, and Enrico reminds her that she has a teaching diploma. Soon after, she decides to become a teacher and joins a school. She is also reunited with her daughter, Marianna, who finally comes to visit her. As for Enrico, Zanardelli, now the minister, offers to make him the undersecretary. But he is needed in Rome immediately, which means he would have to drop Grazia's case midway. He refuses and believes his political career is doomed. However, that is not the case as he not only wins Grazia's case but it is considered a historical win.
Fourneau pushes for the death penalty in his closing statement. As for Enrico, he declares that if Grazia hadn't acted, she would be dead, and Fontana would only get a couple of years for "defending his honour." The law is unfair towards women. He hopes the jury will want their daughters to live without fear. He believes this is a landmark trial, and with their decision, it’ll be the first step towards protecting women. Lidia asks Grazia to have hope, and she decides to trust her instead of escaping prison. Fortunately, she is declared innocent and reunited with her daughter.
On the judicial front, Fourneau pushes for a guilty verdict. But on an ethical and moral front, he does see Grazia as a victim and wants her to have a fair trial. However, Judge Davanzati writes Fourneau’s closing statement for him, leaving no chance for an acquittal for the sake of "honest family men." When Fourneau refuses, Davanzati reveals that he has receipts for his Vienna tickets that he had purchased for Lidia. Davanzati threatens to leak them, which would ruin Fourneau’s reputation. During the final hearing, Fourneau is angry and apologetic but listens to Davanzati. When Grazia is declared innocent, he is happy for Lidia’s sake.
As Lidia escapes through Roberto's tunnel, she is suddenly enveloped in a vision of 1920. In this vision, the Italian bar association apologizes and officially recognizes the 65-year-old Lidia as the first female Italian lawyer. The courtroom is empty when Lidia, at the end of the episode, puts on a spare advocate's robe and smiles, choosing to believe her vision as real.
An epilogue reveals that the real Lidia Poet worked tirelessly with Enrico for 35 years, taking up cases for the marginalized. In 1is year 1920, at the age of 65, Italy finally recognized her as the first Italian female lawyer.
