Three of Brazil's most violent penitentiaries get the camera treatment in this compilation from the Behind Bars series. The film opens inside Urso Branco, a prison in Rondônia notorious for gang massacres and a body count that has drawn international human rights attention, then moves to the São Luís Female Prison, where overcrowding and gang hierarchies shape daily survival for women inmates, and closes at Geraldo Beltrão Prison. Interviews with inmates, guards, and officials sit alongside footage shot inside the wings and cells, showing makeshift weapons, cramped dormitories, and the informal power structures that gangs like the PCC and Comando Vermelho impose where state control has broken down. The narration lays out how understaffing, corruption, and rival gang territory turn these facilities into some of the deadliest in the Western Hemisphere. Rather than a single narrative arc, the film works as three linked case studies, each one built around access that is rarely granted, and each ending on the same question of whether these institutions can be called rehabilitation at all.