Lisa Vanderpump is still wary of her former friends but begins to reconnect with Yolanda and Kyle; all of the women come face-to-face at Kyle's extravagant White party; the annual event brings together the original Beverly Hills housewives.
Kim and some hunky movers help Brandi move into her new house, but Brandi is more interested in the guys' abs than unpacking boxes. Kyle and her family jet to Lake Tahoe in a private plane while Yolanda surprises David with a very special, and very revealing dinner. Kim and Brandi celebrate being BFFs by dressing up in disguise to spy on Brandi's ex-boyfriend, J.R.
Lisa Vanderpump throws Lisa Rinna a private birthday dinner at PUMP and Lisa Rinna's husband shows up just in time with just the right gift. Brandi is settling into her new home, but is still dealing with old drama from her ex-husband. Kim is looking nowhere but forward as she and her daughter, Brooke, go dress shopping for a very special occasion. Lisa Rinna meets up with a friend from way back, Emmy-winning soap actress Eileen Davidson.
The two Lisas bond as Vanderpump invites Rinna to watch her receive a plaque on the Palm Springs Walk of Stars. Before jetting off for a family trip to Spain, Kyle fears that her coughing sister Kim will make her ill. But all is heavenly when Kyle arrives in Mallorca and settles into her 100-foot-long private yacht. Yolanda joins Kyle for fun in the water and sightseeing in the gorgeous town. But the perfect vacation is ruined when Yolanda gets a phone call with horrible news about her daughter Bella.
Kyle returns home early from Spain to attend Kim's daughter's wedding; Eileen reprises her role as Ashley Abbott on "The Young and the Restless"; Yolanda deals with the fallout from her daughter's DUI.
Lisa Rinna returns to her home town of Medford, Ore, to visit her ailing parents; Eileen gets a chance to meet everyone at Kyles BBQ party; Brandi pressures Lisa Vanderpump for an answer about her housewarming party.
The time has come for Brandi's housewarming party, and everyone is shocked when an unexpected party guest shows up. Lisa Rinna guest-hosts Access Hollywood Live, while fellow actress Eileen tries out a new form of exercising. Elsewhere, Kyle learns that her daughter still has a lot to learn before she leaves for college. Lisa Vanderpump hosts a charity event at PUMP, where Brandi makes her an unusual offer.
Brandi and Lisa Vanderpump finally meet for lunch to talk about the status of their tenuous relationship. Yolanda struggles with trusting Bella after her recent DUI charge. Eileen and Brandi share marriage stories over dinner, but the evening quickly turns sour when Brandi hears Eileen was married to somebody else when she met Vince. The ladies attend a dinner party at Yolanda's home in Malibu where tensions are high between Eileen and Brandi.
Kyle and Yolanda both have common concerns about their daughters attending college. In other developments, Lisa Vanderpump discovers her son's aspirations. Lisa Rinna shoots a film with husband Harry Hamlin and magic man Penn Jillette. Brandi sizes up her former husband's new reality show.
The ladies travel up the coast to Santa Barbara to enjoy a day at the spa, but what should be a relaxing afternoon turns tense. Eileen opens her house to her new friends, inviting Kim, Kyle, Lisa Rinna and Brandi to her Malibu home for a night of poker. Kim's erratic behavior puts everyone on edge, leading to an explosive confrontation between Brandi and Kyle.
The drama continues at Eileen's poker night with Kyle and Brandi get into a heated argument over Kim but things quickly take a turn for the worst and things gets physical. Lisa Vanderpump returns from her vacation. Afterwards, Lisa Rinna presides over a jewelry party for the girls, where Kyle receives shocking news about her sister Kim.
Lisa Vanderpump is surprised when adopted son Max decides he wants to take a DNA test to discover his heritage. Brandi and Kyle both visit Kim, who has just been released from the hospital, and a session of she-said-she-said ensues. Later, Brandi shows up uninvited to Kyle's gay mixer where insults are hurled and things get ugly.
After the blow up at Kyle's gay mixer, the other women speculate about Brandi's influence over Kim. The ladies attend Eileen's movie premiere at a shopping center in the suburbs. Lisa Vanderpump is nervous when her son receives his genealogy test results. As Eileen brings the Richards sisters together to discuss their problems, Lisa Rinna questions Brandi about Kim's recent behavior.
Eileen organizes a table read for her husband's latest Hollywood script, inviting the actresses: Kim, Kyle, and the two Lisas. Kim and Kyle act like everything is okay between them, but after the read, emotions run high, leaving everyone wondering what lies ahead for Kim. Brandi agrees to a 21 day cleanse of no alcohol, but attending Lisa Vanderpump's surprise birthday party may have her second guessing her decision to stay sober.
Yolanda hosts a scavenger hunt around Beverly Hills, and the ladies must push aside their various issues and work together as teams but the truce doesn't last very long afterwards as the women jet off to Amsterdam for a group trip and drama between the Richards sisters continues.
With tensions still high, the ladies start day three in Amsterdam by splitting into two groups to explore the city. Eileen confronts Lisa Rinna about Lisa's failure to support her in front of Kim. Later, at dinner on a riverboat, all the unresolved issues come to a head. The night climaxes with Brandi playfully slapping Lisa, but for Ms. Vanderpump it's no game.
Lisa Vanderpump refuses to accept Brandi's apology for slapping her the night before. After a final dinner in Amsterdam, which Brandi skips for a date with a 24-year-old, the women return home. Brandi gets bad news about her father's health. Kyle is shocked when Lisa Rinna tells her that Brandi has talked about Kim needing an intervention. Later, in Palm Springs, Kyle angrily reveals to Kim what her "best friend" Brandi has been saying behind her back.
The women attend a splashy, over-the-top party thrown by the group's old friend Adrienne Maloof. Lisa Vanderpump confronts Brandi about Brandi slapping her in Amsterdam, but Brandi doesn't want to hear it. Kyle gets angry with Lisa Rinna for not confirming to her sister that Brandi is also worried about Kim's sobriety. Kim wants answers from Brandi.
The gripping three-part reunion begins with Yolanda revealing the difficulties she faces relapsing with Lyme disease. Although she does leave the couch early, Yolanda stays long enough to defend her daughter from Brandi's "alcoholic" comment and attempts to create some peace within the group. Kim declares she has more "pride" than Lisa Rinna in the roles she chooses and Brandi and Lisa Vanderpump getting into an argument that suggests little future for their onetime friendship.
The Beverly Hills housewives share laughter over their health and beauty regimens and shed tears talking about their children who are growing up and leaving home. Brandi delves into the tough year she's had, while Kim doesn't hide her conflicted feelings about Lisa. After some rough words, Kyle and Carlton determine that they will probably never, ever be friends.
In part three of the dramatic Beverly Hills reunion, Lisa is in the hot seat as Yolanda, Brandi and Kyle all discuss the problems they've had with her while, at the same time, hope for some resolution. The husbands join the fray and Ken tells a teary Brandi that he may never be able to accept her back into his life. Or can he?