Patsy, who is temporarily staying with the Monsoons, becomes jealous when Edina reconnects with an old boyfriend. During one of her sporadic appearances at work, Patsy is assigned to host a fashion makeover segment on a morning television show. After clashing with the models, Patsy attempts to persuade Saffron and Mother to appear on the show in their place, telling a tale of her emotionally distant mother. Saffron agrees, on the condition that Patsy moves out of the house and does not interfere with Edina's relationship. Patsy's television appearance turns disastrous as she suddenly becomes nervous. After Patsy convinces Edina to break up with her boyfriend, Saffron lashes out at Patsy for not upholding her end of the deal.

Saffy becomes engaged to her snooty new boyfriend, Paolo Carlo. Eddie and Patsy go on a ski trip where Eddie has a near-death experience. Bo arrives, hiding from the Scientologists. And "Mother" goes to the airport to meet two old friends she hasn't seen in years.

Paolo's parents arrive, disapproving of Saffy... until Patsy realizes that she knows Paulo's mother. Eddie and Saffy plan the wedding and see it through - only to have it ruined at the last moment by Divine Intervention.

Edina enrolls in a boot-camp fitness programme and subjects herself to a strict diet, after being ridiculed for her weight by Katy Grin, Catriona and Fleur. Meanwhile, Patsy briefly experiments with pulling back her signature fringe for the first time in decades, and budding playwright Saffron receives a visit from Taylor, a pretentious old school friend with acting aspirations. Despite initially struggling, Edina's efforts soon pay off as she realises she has lost one stone. Proudly displaying her slimmer figure, Edina meets her friends again for lunch, but her weight loss is still not enough to deter Katy Grin's snide remarks.

Patsy's off to New York's fashion week and drags Eddie along for company. As you can imagine it didn't take much persuasion, especially after Mother lets it slip that Serge is living there. The pair get into all sorts of mischief in New York, including a Gay wedding, celebrity appearances and fashion faux pas. Meanwhile, back in the UK, Eddie's first husband and partner Bo run a christian TV channel. Saffy's studying people whilst in a cupboard and Bubble desperately tries to be useful.

Upon discovering that Serge is gay and living in New York, Edina is thrilled to reunite with her long-lost son as she plans a trip to New York Fashion Week with Patsy—despite Saffron's objections. In exchange for Serge's contact information, Edina and Patsy are forced to get married by a counsellor at an LGBT drop-in centre where Serge volunteers. Edina finally locates Serge, who works in a second-hand bookstore and, to her surprise, is essentially the male equivalent of Saffron. Despite initially rebuffing Edina's attempts to reconnect due to unresolved issues, Serge is convinced by his flamboyant boyfriend, Martin, to spend the day with her. Edina, Patsy, Serge and Martin attend Fashion Week and later go on a bar crawl. The night ends with Edina and Patsy getting arrested after accidentally setting a bar on fire. The pair return home after Saffron posts bail, and Edina reveals that she has disowned Serge in favour of Martin, whom she has "adopted".

Eddie spends her first Christmas at home, much to Saffy's chagrin, and goes all out for the festivities. John is preoccupied with knowing the details of Justin's sex life. Marshall and Bo arrive for Christmas with their details of the infomercial they've been doing "since the bottom fell out of the baby business." Patsy, who detests Christmas, is happy when she collapses and gets to spend a few days on drugs in the hospital... though it seems that her condition may be more dire than anyone realized.