Four prisons across three countries, each running on its own rules. At San Pedro in La Paz, Bolivia, guards stay outside the walls and inmates govern the place themselves, buying cells and running businesses inside a self-policed economy where only the strongest hold power. El Hongo in Mexico's desert is the opposite extreme: mobile phone jammers, fifteen guard towers with snipers, and a reputation for being incorruptible in a country where cartel money reaches almost everywhere else. In Bogotá, Cárcel Distrital packs over a thousand inmates behind red brick walls under a staff of 170 trying to enforce discipline nobody there is used to. At Colombia's Picaleña, the country's fifth-largest prison, no one has ever escaped; inmate Carlos, serving 27 years for murder and drug dealing, describes weekly football matches in the yard while his wife Lilian serves her own sentence 200 meters away for the same case. Interviews with inmates and staff carry each segment, moving between total lawlessness and total lockdown.