Taichung Men's Prison holds forty-five hundred inmates, making it the largest and toughest prison in Taiwan, with more than a hundred men serving life sentences and over a thousand doing twenty years or more. Cameras follow daily life inside, where round-the-clock video surveillance and near-constant confinement define the routine, and inmates get only one session a week in the yard. The film lays out the prison's progressive correctional treatment system, which sorts prisoners into four levels based on behavior, controlling everything from cigarette rations to visitation rights. The real incentive is time itself: climbing a level shortens a sentence, which the film argues is why most prisoners choose to keep their heads down rather than cause trouble. Interviews with inmates and staff fill in the texture of a system built on incremental privilege and constant observation, part of the wider Behind Bars series that has covered prisons from the Philippines to elsewhere in Asia. This episode's focus stays narrow and specific to one institution and the mechanics that run it.