Tracey is shocked to receive overdue bills. There is also a letter from Garth, telling Tracey he has had a fight at school and she will have to pay for half the damage. To top it all off, the central heating breaks down and they hire two female plumbers, Alison and Gloria. Shortly after they leave, the tank starts leaking.

Sharon goes to the aid of 53-year-old Don Sheridan who is mugged at Chigwell tube station. That evening, they accidentally meet at a bar and he says he is in Chigwell on business as financial adviser to Marcus, who is apparently near to going under. They go out several times and sleep together, despite him being married. On his final night before going home, they plan to re-live the 1960s by taking drugs, which Sharon had been given to pass to Chris in prison. The police arrive to return Don's wallet, leading Don to flush the drugs down the toilet. Meanwhile, Dorien pays £2000 to have her telephone number changed to 071, as she sees it as more exclusive.

As Sharon approaches her 30th birthday, she looks back on her life and regrets her lack of education. She pays a visit to her Edmonton council flat, where she meets Lisa, whose criminal partner is in the property business and Sharon considers buying the flat. Tracey disapproves of the idea. Dorien, however, is more encouraging and goes with Sharon to the flat. However, Lisa's partner is soon sent to prison and Sharon then takes his place on a holiday with Lisa to Benidorm with Club 18-30.

When a man, Charles Fitzroy, knocks on the door one evening asking for some water for his car, Sharon tells him all about Dorien and her relationships, which he seems interested in. After visiting Chris in prison, Sharon suspects that Charles may have been a police spy interested in the proceeds of Darryl and Chris' crimes. Soon after two policemen come round and they ask about the whereabouts of Dorien and Marcus, who needs to be questioned about a major fraud case of which he was the accountant. Sharon tells them they are on holiday in Zurich. When Dorien returns she finds that a Sunday newspaper has an article on her private life, and Sharon and Tracey feel guilty.

It's Thursday night. Dorien's date has been cancelled, and Sharon and Tracey are bored. When the VCR blows up, Dorien generously offers to pay for an activity weekend for the girls. Sharon is unsure about the activity on offer which is hang gliding, later it turns out Dorien has had an accident so the activity weekend is cancelled.

Sharon's flat is now housing belligerent squatters Cedric and Egbert; her neighbour has also been acquiring mail-order items using Sharon's identity. Chris offers to sort things out - with the aid of 'Batty' Harold and his mates, who specialise in GBH.

Sharon and Tracy are given the use of a holiday villa in Majorca by an old friend of the boys. Garth, who's working for Dor's husband, manages to get them and Dor free tickets over there. But he fails to mention why. That becomes obvious, when they step into the villa and see Daryl and Chris, who have escaped from jail while doing a music performance.

Dorien's life story, complete with steamy revelations, is about to go into print, and suddenly she's got cold feet. But can she persuade Sharon to impersonate her?

A mystery pension fund payment leads Tracey, Sharon and Dorien on a voyage of discovery which ends with a big surprise.