Supervising officer Leigh Henry comes under increased pressure to produce her birth certificate to secure the promotion she so desperately wants. The return of a troublesome old adversary on the wing is the last thing she needs, and her controversial strategy to help a prisoner who's being intimidated pits her against Gary, but could bring an unexpected solution to her problem. Meanwhile, with the help of her colleagues, probationer Rose starts to find her feet in this terrifying new world - though a tense encounter with a prisoner reminds her what's really at stake.