An elderly nun called Sister Thomas More arrives at Larkhall for a 6 month stretch for embezzlement and theft. Immediately, she gets on the wrong side of Hollamby who is disgusted when she sees violent lash marks across her back. Natalie meanwhile hates nuns; she takes it upon herself to give Sister Thomas a good thumping to remind her that the habit offers no protection from the evil on G-Wing.

Natalie is still waging psychological warfare on Di. This time, she gets the red-band on tea duty in the PO’s Office to plant a letter. Her plan backfires when Fenner comes across the letter first and then reveals its contents to a furious, but quickly placated Di. Fenner has now had enough of Natalie and takes great pleasure in informing her that she can forget all about her weekend visit. But Natalie has an ace up her sleeve…or rather a pair of knickers covered in Fenner’s ‘DNA’.

As a devout Catholic, Arun has already gone out of her way to settle Sister Thomas in, but it is a major surprise when the other inmates, Darlene included, also rally round. Natalie has already lost face because of Sister Thomas’ refusal to be intimidated and Darlene’s defiance is a major annoyance. After Sister Thomas somehow manages to heal her injured eye, even Janine is making a stand against Natalie in favour of the aged nun. When he hears that Sister Thomas is making a charity blanket to raise money for AIDS sufferers in Africa, Neil goes out of his way to get the rest of G-Wing involved in the project. He’s practically wetting himself at the prospect of good publicity for Larkhall and quickly rounds up a photographer to take some snapshots for the Prison Service newsletter. But why is Sister Thomas so reluctant to join in for a group shot?

Fenner buys Natalie some sexy underwear as a peace-offering and hopes to persuade her to hand over the pair she’s holding as evidence. Natalie refuses—she’s keeping them as insurance against his nutty wife. She does however agree to leave Di alone in return for Fenner reinstating her weekend visit. As soon as she’s serviced Fenner, Natalie goes back on her promise and informs Di about the underwear her husband has just bought for her. Di decides to get her own back by stealing a pair of scissors from the Julies’ salon. During the cell-search that follows, the missing scissors are found inside Natalie’s mattress.

Dr Nicholson has put Hollamby in contact with a financial advisor and he’s very willing to lend her £500,000 against the security of the substantial assets bequeathed to her by her Aunt. Hollamby can’t wait to spend the money on a lavish wedding reception and a brand new car for her beau. Later, Hollamby is faced with a tough decision when her Aunt’s solicitor briefs her about a strange clause in the will. For her to inherit the house, she must remain a spinster! Hollamby is devastated; she has to choose between marrying Dr Nicholson and losing her new found wealth, or tell him the truth and risk losing him. What will she decide?

Arun has a dark secret that she is desperate to keep under wraps. The pills Janine stole from her were in fact hormone pills and without them, she’s suffering from a rather embarrassing facial hair problem—a beard and a moustache! She contacts a friend on the outside and begs him to smuggle some pills into her. But he is caught and as a result, she is taken straight down the block. Horrified, Arun pleads with Colin to allow her to speak with Sister Thomas. As soon as the nun arrives, Arun confesses all—she’s a post-op transsexual.

In another prison, inmate Pat Kerrigan is informed that her request to be transferred to Larkhall has been approved. Smiling to herself, she picks up a copy of the prison newsletter and studies the picture of G-Wing’s inmate proudly holding up Sister Thomas’ charity blanket.