When she discovers that Big is dating other women, Carrie realizes that she desires a monogamous relationship with him. In the meantime, Samantha is having trouble being monogamous with her realtors. Charlotte dislikes the sexual desires of her new boyfriend, and Miranda confronts jealousy when she runs into Skipper with his new girlfriend from Vogue.

While Carrie and Stanford hang out at the bar of Brasserie 8 1/2 in midtown Manhattan, they run into Lynn Cameron, an old friend, who is producing a NY fashion show featuring real models and famous New Yorkers as models. She insists Carrie model in the show for her. Meanwhile, Miranda can't believe it when hunky guy at her gym asks her out on a date, telling her he thinks she's sexy. Samantha is trying to get ready to pose for nude photos, sticking to a healthy, organic diet. She says she wants to remember her body as it is before everything goes south. Charlotte has to make a trip to her gynecologist because, as it turns out, her vagina is "depressed." Her doctor gives her anti-depressants and tells her to keep a vagina journal. Later, she sets up Stanford with her old wedding stylist, Anthony Marantino, for Carrie's big day as a model. When he had asked her about Stanford on the phone, Charlotte described him as a young Ed Harris. When Anthony sees Stanford at the fashion show, he is not happy, and he takes off. Carrie is backstage at the fashion show, thinking she's going to wear a beautiful blue sequined dress by Dolce & Gabbana. Backstage, the designer (played by Alan Cumming) says there has been a change of plans. She's now wearing a pair of jeweled panties. Carrie freaks out. He says not to worry, there's also a great blue jacket with it. Carrie's not sure she can go on stage like this. She asks Samantha to comeback stage to tell her honestly how she looks. She tells her she's a model and she looks fabulous. Carrie goes on stage and promptly falls in her stiletto heels. Heidi Klum follows her down in the runway, and Stanford exclaims, "Oh my God! She's fashion roadkill!". Carrie can't do much else besides get up and laugh it off and flash her best smile. Her courage to get back up inspires her friends to face their fears as well.