A group of pupils occupy a Catholic school in protest of a sexual abuse scandal implicating one of their teachers. During the occupation, Blanca Ibarra – one of the students and a leader in the protest – disappears. Hours later, a video appears online and quickly goes viral, showing Blanca being violently raped by a group of hooded men. There is no indication where Blanca is being held – or even if she is still alive. The only clue the police have is that all of her attackers belong to the same WhatsApp group known as ‘La Jauría’ (‘The Pack’). With Blanca’s fate unknown, her assailants still at large, and growing public demonstrations against the crime, an investigating police team will face the most difficult case of their careers.