[s2e1] 20 Horas Desaparecido -

A police investigation is underway because a student has been missing for 20 hours .

The premiere establishes the heavy emotional baggage each character carries into the new term:

He is burdened by the secret of who actually killed Marina and the guilt of letting an innocent man go to jail. [S2E1] 20 horas desaparecido

The episode introduces a narrative structure used throughout Season 2:

Lucrecia’s hedonistic half-brother, who immediately begins stirring up trouble. A police investigation is underway because a student

The story flashes back to three months after Marina’s death. The students are returning to Las Encinas for a new school year, still reeling from the events of Season 1. Key Character Arcs & New Faces

He remains in deep mourning for his sister, Marina. The story flashes back to three months after

Determined to prove his brother Nano’s innocence, Samuel begins a dangerous game to uncover the truth about Marina's murder.