A prison with guards on the outside but not on the inside because they fear for their lives. On the inside, the prisoners are in control: murderers, violent offenders, drug bosses. This is the prison city of San Pedro in La Paz, Bolivia, where the inmates rule and anarchy prevails. Money, violence and power. Only the strongest survive this lawless place, and they rule over the weak, demand protection money, rent for sleeping areas and determine what rights and obligations the prisoners have.