The fight against prison gangs continues and the rookies search for evidence to eliminate the problem. Also: one C.O. redeems himself with STIU; drugs are found in the open dormitory; an angry inmate causes an emergency; and one C.O. reaches out to his brother for help.
Frustration sets in for a C.O. who has trouble catching contraband while another learns a tough lesson about trusting inmates when a phone goes missing. Also: another C.O. joins the elite STIU team to speak with a gang member and a new rookie arrives.
A gang member is subdued after threatening two C.O.'s; a former SNM gang member tries to intimidate a C.O., forcing him to abandon protocol; drugs are discovered in an inmate's mail; and a C.O. gets a new assignment in discharging a high-risk inmate.
The rookies learn to assert authority as they face predatory inmates. Also: Ariel supervises a death-row inmate; Lilly encounters a pod of gang members; Purto returns to work after a violent assault; and new rookie arrives.
Young rookies overcome fears while facing violent convicts, gang members and combative inmates. Also: one C.O. faces repercussions for missing drugs in an inmate's cell and a timid recruit tries to graduate from the training academy.