Stephen Nolan enters the prison and experiences what it is like when the doors are locked. He walks the corridors and enters the cells, talking with the inmates, sharing their daily routines, uncovering truths about abuse and fractured home lives. He challenges them about responsibility to their victims and finds out why they felt they were compelled to do the things they did. Episode Two opens with a surprise prison lockdown and search by officers for a missing knife and any illegal drugs.