The Boarding School

The arrival of María, a new cleaner with a mysterious past, at La Laguna Negra boarding school unsettles the calm maintained by headmaster Héctor and the strict head of studies, Elsa, as an unexpected bond forms between María and Héctor. Meanwhile, students Marcos and Paula, who have lost their parents, find themselves under Héctor's care, adding emotional complexity to the already fragile dynamics at the school.

María seeks assistance following her termination. The other women notice a ring on Marcos' finger that resembles Alfonso's.

Marcos finds a hidden entrance in Alfonso's closet, leading to a series of mysterious discoveries and raising new questions about Alfonso's past.

Carolina impersonates Alfonso and emails Ricardo Montoya, arranging a meeting at the cemetery. Montoya, a journalist, tells the children about the disappearance of five orphans in the 1970s and warns them of the risks involved in continuing their investigation, urging them not to trust anyone. Meanwhile, Marcos grows concerned about his sister's deep immersion in her fantasy.

Héctor finds the disfigured body of journalist Ricardo Montoya in a lagoon, and the group realizes they have lost crucial evidence linking to the deaths of five orphans. As they attempt to recover more clues, workers begin sealing off the well permanently at the school's orders, and a series of accidents in La Laguna Negra convince the boys that the threats they faced are genuine. Meanwhile, Jacinta grows increasingly despondent as the postman continues to return the letters she sends to her daughter Verónica.

The school mystery reaches a dramatic turning point when it is revealed that a student has been discovered deceased in the woods.