El Marginal (TV series)

Miguel (Juan Minujin), 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 (Gerardo Romano), a social psychologist (Martina Gusmán) and one of the most important recluses, who controlls the prison from inside (Claudio Rissi) are part of this big mafia structure. - IMDb