Parents bring their kids to school on the first day of the academic year; there are two new students: Marcos and Paula.

Jacinta discovers María's secret and asks her to leave the boarding school forever; Victoria and Carolina are worried about Alfonso's mysterious disappearance, so they start their own investigation.

Héctor tries to organize a romantic evening with Elsa, but his busy work life gets in his way; Marcos discovers a secret entrance to Alfono's wardrobe; María tries to win Iván's heart.

The kids find out that, in the 70's, five orphan children went missing under suspicious circumstances; Marcos is worried about his sister, who lives in her own fantasy world and has made friends with a gnome.

When Héctor finds journalist Ricardo Montoya's dead body, the kids realize they have lost the only piece of evidence they had of the murder of the five orphan children; Jacinta is depressed because her daughter will not talk to her.

Cayetano, Roque, Victoria and Carolina find Alfonso's dead body when they are trying to find a way out of the passage; María organizes Santa Isabel's party, an evening in which students, staff members and teachers have dinner together.