Juan Oliver wants to make a good impression at his new job as a prison officer and reports to work a day early, leaving his pregnant wife, Elena, at home. His destiny is forever changed by this fateful decision, as during his tour of the prison, an accident occurs that knocks him unconscious. He is rushed to the empty but visibly haunted walls of cell 211. As this diversion unfolds, inmates of the high security cell block strategically break free and hijack the penitentiary. Aware of the violenc...