In the fourth episode of "The Law According to Lidia Poët," we are introduced to a case that strikes a chord with Lidia on a personal level. The episode begins with the public shaming of Margherita Sangiacomo, a respected professor at the university, who is accused of poisoning Professor Braschi. The case is particularly challenging for Lidia, as it brings to light the gender biases and societal constraints faced by educated women like Margherita, who are often mistrusted and resented for their intellect.

Lidia's determination to prove Margherita's innocence is met with resistance from the legal community, which is quick to judge Margherita for her non-traditional pursuits. The defense lawyers have given up on her case, but Lidia sees an opportunity to fight for justice and challenge the prejudices that have long suppressed women in academia and the legal profession.
As Lidia delves into the case, she uncovers a web of deceit and a possible motive for the murder that points towards Professor Manganelli. However, his solid alibi and the lack of concrete evidence make it difficult to build a case against him. Lidia's keen observation skills lead her to question the testimonies of those around Margherita, including the caretaker Rico, who she suspects may have been intoxicated during the time of the murder.
The episode takes a dramatic turn when Lidia discovers that Margherita's mother was a prostitute who died under similar circumstances to those of the alleged poisoning. This revelation connects the case to a series of unsolved deaths from seventeen years prior, suggesting a deeper conspiracy at play.
Lidia's pursuit of the truth leads her to confront Margherita directly, urging her to reveal the truth about her involvement in the murder. In a powerful moment of confession, Margherita admits to the crime, explaining that her actions were driven by a desire for revenge against those who had wronged her mother and other women like her.
The episode concludes with a powerful statement on the role of women in society and the fight for justice. Margherita's choice to confess her crime, despite the evidence against her, highlights the sacrifices made by women who challenge the status quo. Lidia, though unable to save Margherita from conviction, emerges as a symbol of hope and resilience in the face of adversity.
This episode of "The Law According to Lidia Poët" is a gripping exploration of the complexities of justice, the power of truth, and the impact of societal prejudices on the lives of women. It serves as a reminder of the importance of questioning the narratives we are presented with and the courage it takes to stand up for what is right, even in the face of overwhelming opposition. Lidia's journey continues to inspire as she fights for a more equitable legal system, one case at a time.