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.
Cameras capture the lives of some busy, influential, rich and ambitious Manhattan women and their families.