Now there are a few rather daft plot holes here, but in the main this is a really strong prison drama anchored well by Luis Tosar and Alberto Ammann. The latter man ("Juan") is on an orientation visit to a high security prison were he is shortly to begin work when a full scale riot breaks out. That is being led by "Malamadre" (Tosar) and it's only by luck - he had had an earlier accident and was recovering in cell 211 - that he isn't taken hostage like two of his soon-to-be colleagues. He's quite a quick thinker and thanks to him being slightly bloodstained, manages to convince their new boss ...