Following the student rebellion over the death of Elías, Las Cumbres Boarding School has become harsher and more hostile than ever. But now that Amaia and Paul know that Adèle has seen Manuel alive, they won't rest until they find him.

The students, increasingly beaten down by the measures inflicted on them by the boarding school, find proof that would prove everything to the police. How can they get it to the outside world from inside this prison?