The New York ladies are back and moving forward; Sonja struggles with an empty nest after her daughter has left for college, while Luann celebrates the end of her probation; Ramona is on the prowl and looking for love.
In the city, Tinsley defends herself to Sonja and Leah over her continuing feud with Dorinda; to celebrate the end of summer the ladies head out to Ramona's house in the Hamptons for a long weekend; Tinsley's flu leaves her voiceless.
The girls weekend in the Hamptons continues; Ramona brings the ladies to a local winery where they learn about Leah's past and Dorinda's present; Ramona's hosting continues at a mansion party that evening with a group of new friends.
Hamptons weekend wraps with a tennis grudge match between Luann and Ramona, while Sonja's dog groomers make a house call and Luann gets in on the action; a girls' night at Ramona's house turns into a wild ruckus.
It's fashion week in NYC; Sonja is preparing for her "Sonja, by Sonja Morgan" fashion show and the ladies sit front row for Tinsley's big return to the runway; Luann plans her new cabaret show; while Leah fears that Sonja resents her.
Leah continues to have issues with her mother and Tinsley gives updates on her dating life; Sonja realizes that her fashion line isn't doing as well as she hoped; Luann hosts an anti-bullying comedy show.
Tinsley vents to Leah's boxing coach about her issues with Dorinda, while across town Dorinda confirms to Sonja that she and John are officially on a break; Luann opens up to Leah about her relationship with drinking.
Stressed out by the tension between the group, Leah arranges a spa day at a Russian bath house; Dorinda and Tinsley call a truce, while Ramona confronts Dorinda about her anger issues.
The ladies head to Newport, R.I., for a much needed weekend getaway; Leah invites her sister Sarah to join the trip, which Ramona is not happy about; the drama continues between Tinsley and Dorinda, and Leah loses her cool at the evening clambake.
Tinsley hosts a dinner for the group on its last night in Newport; the night begins to spiral once Ramona is distracted by a man at the bar; Dorinda and Luann co-host a tea party in an attempt to help the ladies relax and reset.
The ladies celebrate Halloween with a scream-inducing tour of Blood Manor; Tinsley returns from Chicago with a life-changing decision and major relationship update; Ramona brings Dorinda and Sonja to Long Island to help plan her birthday party.
Looking for love again, Ramona meets with a matchmaker; Dorinda and her daughter Hannah discuss Dorinda's recent life struggles; Luann hosts a voodoo-themed dinner party, where Ramona becomes the subject of everyone's witchy ire.
Dorinda hosts the women at Blue Stone Manor for a relaxing weekend; Sonja confronts Luann about paying her less than she deserves to perform in her cabaret show; Dorinda steps in to defend Sonja.
After a night of partying, the ladies wake up to find that Luann has left Blue Stone Manor; the women head to town for some retail therapy; to celebrate their last night in the Berkshires, Dorinda throws an elegant dinner party.
The ladies attend Ramona's birthday bash, which comes to a grinding halt when Leah shows more skin than Ramona can handle.
The women head to Cancun, Mexico, where Sonja gets liquored up too soon and Leah confronts Ramona.
The chaos in Cancun continues; Luann confronts Dorinda about her anger, while Ramona tries to forgive Leah for her behavior; Dorinda organizes camel rides and lunch on the beach for some bonding before they celebrate Sonja's birthday.
In Mexico, the ladies tread carefully at breakfast when Dorinda snaps at Sonja and Leah; Luann and Leah pick up two men while strolling on the beach and bring them back to the villa; the ladies enjoy a fancy dinner with their new male friends.
On the ladies' last night in Cancun, Ramona addresses Dorinda's anger issues in a group text; in New York City, Leah works to improve her relationship with her mother; Ramona sees a therapist; Luann preps for a cabaret workshop; Sonja hosts a party.
Leah hosts a party for the 15th anniversary of her brand, "Married to the Mob"; Luann meets with a ghostwriter for her new memoir, and Dorinda celebrates her birthday out on the town with the ladies and John.
Luann records a new song that she hopes to feature in her upcoming cabaret; Leah continues to rebuild her relationship with her mother; Sonja clashes with Ramona; an invasive surgery has Dorinda looking back at her tumultuous year.
Before the cast members relive some of the most outrageous moments from the season, they express their frustrations about the behavior of one of the ladies during quarantine.
The ladies relive their trips to the Hamptons, Newport and Mexico, including all the drama in between; Ramona addresses Leah's behavior, and tempers flare when she claims Leah ruined her birthday party with her risqué dance moves.
The drama continues when Dorinda calls out Ramona for not supporting her; Dorinda becomes emotional as she defends herself against accusations that she has an issue with controlling her anger; the ladies attempt to end the reunion on a high note.
Cameras capture the lives of some busy, influential, rich and ambitious Manhattan women and their families.