Saffy's first play Self-Raising Flower, based on her young life, is opening at the local fringe theatre. Afraid that the play could bring her public humiliation, Edina plots with Bubble to get the run cancelled. But they fail and the show goes on. Saffy's father, Justin, turns up to support his daughter on the opening night, as does Edina's first husband, Marshall, and his loud American girlfriend, Bo.
Despite having tried every fad diet, Edina is still desperate to be thin, do thin things, feel thin things and to be able to take her clothes off and not be marked by them. The answer is a detox. Spurred on after a Sex and the City-style lunch with her bitchy girlfriends, Edina embarks on a strict regime of water and meat and enrols herself in a gruelling British military fitness program.
A photo shoot in Paris gives Patsy the chance to relive her modelling days and spend time with new best friend, supermodel Erin O'Connor. The Monsoon household accompany her across the channel, as Edina drags Saffy along for a mother-and-daughter Generation Flex feature.
Craig's rough day leads him to a seedy pub where he bumps into an old friend, Vince. While celebrating their chance reunion over a few drinks, they encounter a wealthy couple who tempt the friends into a series of challenges, each with a reward of money to the winner. It's simple at first, but the lucrative game quickly escalates, and soon the friendship and morality of Craig and Vince are tested as the challenges dramatically go off the rails.
Julie and Billy jeopardise their shot at becoming fashion elites when Julie gets sick and Billy gets cast as the lead in a children's TV show.