El Salvador once held the grim record of most dangerous country on earth, with over 3,000 homicides a year among six million people, driven by war between MS13 and Barrio 18. President Nayib Bukele's answer was mass arrest: more than 75,000 people accused of gang membership rounded up and sent to CECOT, the Terrorism Containment Center, built to hold 15,000 inmates and billed as the largest prison in the world. Filmmakers get exclusive access inside its cell blocks, walking corridors most journalists never see, while interviews with residents describe streets once run by killers now quiet enough to host the Miss Universe pageant Bukele staged to prove the country's turnaround. A former gang member now hiding abroad describes life on the run. Amnesty International's findings run alongside the government's triumph, documenting arrest quotas, wrongful detentions, and families still fighting to get relatives released. The film lets both realities sit together: a population relieved to walk home safely at night, and a prison system built on abuses its architect calls the price of order.