Magnus has a side hustle. He drives for The Night Mail, which isn't a bad gig, if you don't mind being possessed. What is the Night Mail? A delivery service with a dark secret - working for the dead.

Saffy receives a visit from her sadistic midwife and is subjected to a demonstration of the most painful aspects of childbirth. Eddy meets with her book club and is distressed to find that Elizabeth Hurley has pulled out. Only Patsy, Plum and Mariella Frostrup turn up to discuss the merits of OK! magazine.

Edina Monsoon and her best friend Patsy face a heavy day. Eddy is frantically preparing for her debut fashion show and trying to prove to her daughter, Saffron, that she can function without booze. Patsy, content for alcohol to remain a substitute for food, isn't helping.

Eddy is contemplating ways to lose weight. The problem becomes critical when she hears she is going to be visited by her reed-like model friend from the 60s. Drastic measures are taken as Eddy embarks on an aggressive weight loss regime, which includes 's

Eddy's ex-husbands have discovered that she has been deceiving both of them into paying her alimony, and cut off all support. Eddy is forced to cut her expenses, but Saffron despairs when her mother's attempts at frugal living take her food shopping in Harrods, and getting rid of the driver proves to be a false economy.

Eddy's determination to make sure the decor in the new kitchen is perfectly coordinated takes her to New York in search of the perfect door handle. Saffy is not impressed, and to make matters worse Patsy wants her help interpreting a letter from the health authority.

Saffy has plans for New Year's Eve - a quiet night in with Gran, her dad Justin and his boyfriend Oliver. But this won't do for Eddy, who has made a resolution to have more fun and plans to see in the New Year at a club in an underground car park. All plans are halted, however, by the arrival of Patsy's long lost sister Jackie.

Patsy shacks up with Edina after Saffy leaves for university, but the pair find it hard to survive alone. Everything gets significantly worse for Eddy when Lulu decides to join a more efficient American PR company, and when Patsy also gets some bad news they are faced with a major crossroads in their lives.

Patsy hates Christmas and refuses to acknowledge its existence. Unfortunately, Eddy has plans this year and for the very first time, she wants to stay at home with Saffy and her granddaughter. All of this Christmas spirit is too much for Patsy and she finds herself in a downward spiral.

Twenty years after Eddy, Patsy, Saffy, Bubble and Mother first staggered into our lives, they're all back. One of them has been away for some time, so there is lots of catching up to do. She returns with a new best friend, who is both a blessing and a threat to the household. It forces them closer than ever. It may even involve one of them owning up to her real age.