New rookie COs hit the line in New Mexico's prison system, where violence is at an all time high as the notorious SNM gang has declared war against all COs. Petite Lilly is desperate to prove herself, but is stuck doing traffic duty on here first day. D'Angelo goes head to head with a troublesome inmate. Seasoned rookies Mangin and Cordova face a new challenge when a dangerous ex gang member leaves his cell unrestrained and Christian must take action to prevent a fight between inmates from turning deadly.