Behind bars, there are two sets of rules: prison protocol and convict code. To survive one, you might have to break the other. So begins another day in a brutal world, where respect is hard-won, time is distorted, violence is a constant threat and redemption is an elusive quest. Hard Time Season Two reveals more gripping stories of life behind bars for a gritty long-view into a hidden world of prisons. With inside access, National Geographic follows both those who work and those who serve time — from nonviolent first-time offenders in a military-style boot camp to repeat criminals in "Hi-Max" the most extreme disciplinary environment allowed — tracking the hazy line between control and chaos.