Teddi’s beach house weekend ends abruptly—and disastrously—when Dorit reveals to Erika what was said about her after her unexpected departure. The ladies descend upon New York for Fashion Week. Lisa Rinna helps her daughter, Delilah, get settled in New York City. Private information about Lisa Vanderpump is revealed publicly—and some of the ladies worry how she’ll react once she finds out.
While still in the Big Apple for Fashion Week, Dorit attempts to come clean with Lisa Vanderpump, but Lisa isn’t sure she’s getting the whole story. Erika meets with her publisher to give an update on her book. Meanwhile, Kyle gets wind of what Dorit has been saying about her from Teddi. And what should be Dorit’s big night turns into a big altercation.
With front row seats to New York Fashion Week, Dorit tries to get back into Lisa Vanderpump’s good graces, while Kyle wants an apology from Lisa but doesn't think she'll get one. Erika comes face to face with Kyle’s old friend, Bethenny Frankel, who was critical of Erika’s music the last time they met. Lisa Rinna’s daughter is already feeling homesick. Teddi persuades Lisa Vanderpump to do the unthinkable.
Erika is surprised by her own emotions as her Hollywood journey comes full circle. The women attend Camille’s charity event, where Teddi’s motives are brought into question. Dorit tries her best to repair her relationship with Lisa Vanderpump, but ends up experiencing a side of Lisa she’s never seen before. And at Lisa Vanderpump’s birthday party, Camille attempts to silence Dorit once and for all.
Erika and Lisa Rinna meet up with old friend Eileen Davidson for drinks. After unexpectedly finding her dream home, Kyle struggles with the decision to stay in her current house or move. Erika strikes a pose for her book cover. Teddi drops a bomb that could damage Lisa Rinna’s newfound friendship with Dorit, but when the dust settles, it’s Erika who Teddi finds herself at odds with more than ever before.
After her explosive encounter with Erika, Teddi worries about seeing her at Lisa Rinna's luncheon. Kyle’s séance conjures up some unexpected guests, but the group gets a bigger shock when Erika reveals information about her past. Lisa Vanderpump is struck by sudden tragedy at home.
Kyle packs her house for her upcoming move. Lisa Vanderpump’s documentary about dog abuse in China premieres at a film festival. Dorit races to finish her swimwear collection on time, and then suffers the consequences when she becomes sick on the way to the girls’ trip to Berlin. Lisa Vanderpump is stunned when Kyle – her friend of ten years – doesn’t remember someone very dear to Lisa’s own heart.
As the Berlin trip concludes, one of the ladies can’t seem to be on time to any of the scheduled events; surprisingly, it’s not Dorit. "Pretend amnesia” rears its ugly head again, and Erika is surprised to hear how Teddi truly feels about her. Kyle’s still upset with Dorit but chooses to ignore her own feelings for the sake of the trip. Dorit stresses over final preparations for her fashion show—and fears she won’t be able to pull off her big comeback.
In the season finale, Dorit launches her swimwear line with a glamorous fashion show that could make or break her design comeback. Camille shares life-changing news. Lisa Rinna worries about Delilah being homesick in New York. Kyle expresses her feelings about Dorit, but it causes an unexpected rift with Erika. Lisa Vanderpump is forced to reveal a hard truth to Dorit.
Erika discusses the public’s reaction to her book and reveals surprising news. Meanwhile, Lisa Rinna explains the reason behind her change in behavior, but not everyone in the group is buying it. When Lisa Vanderpump, Kyle, and Dorit attempt to delve into their seemingly derailed friendship this season, hurt feelings come to a head.
Strong emotions persist as Dorit and Teddi struggle to sort out a year of misunderstandings. Kyle reveals the devastating details of her house burglary last Christmas. Then, Camille Grammer joins the ladies and brings an unexpected gift for Andy. And Lisa Vanderpump finds herself in the hot seat when she defends her reaction to Dorit’s betrayal.
As the reunion concludes, Andy explores the reasons behind Lisa Vanderpump’s fall-out with Dorit. As the ladies relive their trip to Berlin, they question why Lisa Vanderpump was so upset with Kyle for not remembering her grandmother’s name. Kyle gets emotional when discussing her sisters' lack of support around her new projects. All the while, Teddi and Erika confront each other over “pretend amnesia.”
Stassi and Ariana put their rivalry aside to throw an epic winter-themed birthday party, but Stassi's new boyfriend Beau gets his first taste of Stassi's famously bad birthday behavior. Jax confronts Tom Sandoval for questioning his engagement to Brittany, while Scheana finds herself attracted to her "best friend" Adam Spott. James Kennedy finds himself cut off from everyone at SUR, but Lisa vows not to give up on her former DJ.
Stassi struggles to make amends with Beau after her birthday meltdown, while a newly sober James attempts to rekindle his friendship with Lala. Kristen celebrates the relaunch of her t-shirt line, Jax causes trouble at a SUR staff meeting, and the Toms present their cocktails to Lisa in hopes of getting them on the TomTom menu. Finally, when Katie, Kristen, and Stassi's mothers all come to town, the girls learn growing older doesn't always mean growing up.
Katie convinces Lisa to let her host a "Girls' Night In" party on James's former night, but Billie Lee lashes out at Katie for not including her in the planning. Brittany throws an unexpected tantrum, causing her friends to speculate she's stressed over her engagement to Jax. Lala decides James is moving too fast in rebuilding their friendship, and Stassi creates her own personal holiday: National Outfit of the Day Day.