After the mysterious murder of the Spanish ambassador in Lisbon, Teresa follows a lead to a young girls’ academy in Seville. Teresa decides to pose as a teacher and applies for a place at the academy.

Rumors about Teresa are beginning to spread as she resembles the suspect in the murder of the Spanish ambassador in Lisbon. Meanwhile, the academy is involved in a crisis forcing Manuela and Luisa to compete for the principal position.

A photo of Roberta causes rifts between her classmates. Macarena attacks another student, leading to severe consequences. Teresa questions Roberta about what happened between her and Rafita at the party on the farm.

Roberta's trial is underway. While the academy is willing to support her, the parents protest the involvement. Tomás struggles with his own feelings as he holds the key to the verdict.

Teresa continues to unravel the investigation when a mysterious note makes her flee. As the end of the semester approaches, the academy faces a serious economic crisis.