Miguel, a former Argentinian cop, is sent by a judge to get into a prison in order to find the kidnapper of his daughter as a result of a favor. Once in there, he changes his name to Pastor Peña, and tries to survive by gaining the confidence of the recluses. Meanwhile, the Superintendent of the Prison, a social psychologist and one of the most important recluses, who controls the prison from inside are part of this big mafia structure.
This prequel season looks at how Borges and Diosito replaced prison leader El Sapo, at a time when San Onofre was at its most corrupt and violent.
A year before Season 1, the Borges must protect a rich man's son while dealing with forces in and out of the prison that threaten their dominance.
A new prison, a new warden, a new nemesis, a new kid, a new alliance and an ex-wife play critical roles when the Borges are moved to a new lockup.