It's been one crazy summer for the housewives; Bethenny struggles with the passing of her boyfriend, Dennis; Luann comes to terms with her relapse; Ramona learns to swim; Sonja adjusts to her apartment; Dorinda and Luann don't speak to each other.
A fractured group arrives at the Hamptons; Luann, Bethenny and friends head to dinner to discuss the night that forced Luann back into rehab; Barbara tries to bring the ladies together by throwing a clambake, but things go from bad to worse.
At Barbara's clambake, Luann confronts Ramona; Dorinda and Barbara try to clear things up over lunch; Bethenny heads to North Carolina for more relief work; Sonja throws a party during which Dorinda and Luann finally come face to face.
Bethenny hosts a lunch sit-down with Dorinda and Luann, so the two can hash out their issues; Luann begins her court-ordered community service; Tinsley gets a visit from Dale; Ramona goes on a blind date; Dorinda shows Barbara the door.
Tinsley struts her way back into the charity world by hosting a doggy fashion show; the women have brunch on board a yacht; Bethenny speaks with a grief counselor; Dorinda readies Blue Stone Manor for the ladies' first Halloween there.
In the Berkshires, Dorinda organizes a trip to an old Morgan family mansion; Dorinda and Barbara's issues resurface when Barbara finds out she's in the fish room; room drama continues when Bethenny arrives from visiting her new beau.
Bethenny tells Dorinda about receiving a sign from Dennis; Tinsley and Luann have heart to heart over the death of Tinsley's father; when Bethenny hosts a dinner party in the city, a light-hearted game of truth or dare takes a dark turn for Tinsley.
Tinsley and Luann attend an Al-Anon meeting; Dorinda joins Tinsley for a dress rehearsal before her big day as guest ringmaster at the Big Apple Circus; Ramona, Luann and Sonja run into Ramona's ex, Mario; Dorinda hosts a spa day for the ladies.
Fresh off of her breakup, Tinsley prepares for her appearance as the guest ringmaster for the Big Apple Circus; Bethenny has a court appearance; Ramona takes Barbara shopping; at the circus, Tinsley descends from the rafters on a spinning hoop.
After learning that Bethenny missed her Halloween performance, Luann takes another dig at Queen B; Dorinda shows off her new apartment to John; Ramona, Dorinda, and Sonja attempt to give a speech at the NY Loves Kids event.
Newly single Tinsley faces serious questions about having a baby; Sonja and Barbara head upstate to see Luann's new house, hoping to warn her about the rumblings among the other ladies; Ramona, Bethenny and Dorinda arrive at Luann's house.
The women dine out with Ramona at the same place where she mourned her mother's passing; Luann takes Sonja, Tinsley and Barbara out on the town for a night of cabaret; Bethenny and Ramona have a heart to heart about their abusive upbringings.
Luann asks if Sonja is taking something that would explain her behavior; the women head to Miami for fun, sun and the revelation that Ramona made out with Harry Dubin; it's all too much for Sonja who lashes out at Luann and Ramona after a few drinks.
On the first night in Miami, Sonja hits the floor after one too many drinks; the women turn their attention to Luann's attitude; the ladies rally to take in sunshine and art; at a house party, Ramona juggles her ex-husband, Mario, and a new date.
Tinsley shares a recent picture of Ramona locking lips with Harry Dubin; Sonja loses it after leaving an AA meeting, but Luann doesn't let that rain on her cabaret parade; the women confront Luann over her selfish ways; Bethenny has a panic attack.
The ladies head back to New York where Luann records her new single; the women attend Dorinda's 1980s aerobics workout for charity; Ramona plans a surprise birthday party on the same night as the Countess' Cabaret.
The show must go on for LuAnn who has been snubbed by the ladies; Dorinda is shocked by the surprise party; Tinsley is accused of lying about her relationship with Scott; Bethenny throws her S'mores and Whores Party.
The ladies discuss how Bethenny dealt with the death of her boyfriend; the women give updates on their new living situations; Bethenny argues with Luann; Dorinda and Luann finally address their issues, leveling accusations and shedding tears.
The women confront Ramona over her lies and insults; Dorinda, Bethenny, and Sonja challenge Tinsley to tell the truth about her relationship; Luann is in the hot seat as Andy and the ladies discuss her sobriety slip and probation violation.
The women finish raking Luann over the coals about her sobriety; Barbara joins the ladies to discuss her scandalous comment about Luann's singing; the ladies relive some of their most outrageous moments; Sonja is in the spotlight for her drinking.