Former police Miguel Palacios (Minujín) enters as a convict in the prison of San Onofre under a false identity (Pastor) and an invented cause. Its mission is to infiltrate within a mixed band of prisoners and jailers who operates from within the prison. The group has just kidnapped the teenage daughter of a prominent judge of the Nation and therefore Michael's mission is to find the kidnappers and discover the whereabouts of the girl.
After discovering that is captive in a prison area and secure his release, Michael is betrayed, and remains behind bars as an inmate more. Without witnesses who know his true identity and surrounded by criminals and murderers worse, Miguel soon realizes that only escaping can save your life and regain their name.