After Dorit survives a harrowing robbery at home, Kyle brings the ladies together to rally around their friend. While Sutton and Crystal finally see eye-to-eye, a very public diss leaves Lisa seeing red. Erika is excited for a fresh start following a difficult year, but that does not stop Garcelle from asking tough questions.

Dorit and PK try to pick up the pieces following their traumatic home invasion. While Sutton and Crystal's new friendship continues over cake tasting, Lisa lets Kyle know someone has left a bad taste in her mouth. At Harry's party, the glamorous Diana Jenkins makes a rich first impression. The evening is spoiled, however, when issues rise to the surface. Garcelle is dismayed to discover that Erika has not let go of their past grievances.

Kyle invites her friends to the desert for the launch of her new store. Sutton apologizes to Dorit for seeming unsympathetic following her traumatic home invasion. Garcelle urges the women to be up front with each other. While Erika and Diana point out that all their problems share a common denominator, Crystal winds up triggered by a past offense and Lisa feels they're all missing the point.

Crystal talks through her differences with the group, but the conversation takes an unexpected detour when she brings up old wounds--a stunning revelation that leaves Kyle completely confused. Erika tries to justify her stance on Tom's legal situation, but Garcelle isn't impressed. Lisa's world is turned upside down by a family tragedy, Dorit begins therapy and Diana is confused by Sutton's dietary choices.

Kyle and Garcelle attempt to get to the bottom of the alleged "dark comments" Sutton made a year ago, but Crystal refuses to divulge what was said. Lisa suffers a devastating loss. Diana sweetens the trip to Mexico by chartering a private jet, but the getaway may not be enough to ease Dorit's ongoing anxiety. Erika and Lisa's comments push Sutton to a breaking point.

As the Mexico getaway continues, Dorit struggles to work through her robbery-related anxiety while Lisa sees signs of her mother flying all around her. Kyle and Garcelle are convinced they're being manipulated by Crystal, who is also hearing from Erika that she needs to stand up for herself. Sutton snaps at Diana, pushing their new friendship to the breaking point.

The women set sail aboard Dorit's luxury yacht in Mexico, but Erika goes overboard with her partying and winds up three sheets to the wind. Diana admits to Kyle that her temper is still burning hot at Sutton. Garcelle springs a surprise on Lisa, who turns the tables with a stunning admission of her own. Crystal vows to stop holding onto the past.

Crystal unpacks the outcome of the Mexico trip with Rob and Jeff, and Dorit finds comfort in her mother, who is in town for an extended visit. Meanwhile, Erika works on growing a new business venture. A text message sends shock waves through the group, leaving Kyle to wonder who will attend Garcelle's upcoming birthday party. At the celebration, Sutton comes face to face with Diana and her pointed questions reveal a side of the newcomer no one has seen before.

Erika lands in hot water with Garcelle over some choice words. Kyle tries to atone for some words of her own. Lisa is amused by Diana's new look. Crystal tries to help Dorit with her ongoing anxieties. A sinking feeling sets in at Sutton's housewarming party when the hostess and her guests find themselves literally sinking into the backyard mud.

As Sutton's garden party finds itself in the weeds after Lisa's outburst, Erika seeks forgiveness from Garcelle for her past indiscretions. Meanwhile, Crystal gets involved in Sutton's love life and Kyle is left reeling by an accusation she does not agree with. Dorit finds comfort in Hanukkah traditions, but a frigid lunch has Diana feeling anything but the holiday spirit.

Dorit fangirls over Jamie Lee Curtis, who is a special guest at Kyle's charity luncheon. An eye-opening social media post throws attention on Crystal. Sutton comes to the conclusion that some friendships are not meant to be. Lisa is intrigued by a conversation Erika recently had with her estranged husband. At Diana's holiday party, Kathy Hilton makes a return appearance and Garcelle is shocked by an inappropriate joke.

Diana apologizes to Garcelle for acting out at her birthday party. Lisa has a frank conversation with Erika about her recent behavior. Kathy's prank annoys but doesn't surprise Kyle. Dorit isn't happy about PK's brush with the law and makes her feelings clear. Sutton dips her toes into the dating pool and makes a memorable impression on her Bumble match.

Garcelle takes her concerns about Erika to Dorit--then asks a surprising question about Dorit's personal life. Erika makes a stunning revelation that will surely whip up some excitement in her life. Lisa invites the women to sip on rosé, but her past resentment towards Sutton uncorks itself in a big way.

Dorit throws a charity dinner to benefit the homeless, but there is little goodwill between Lisa and Sutton. When Lisa's anger turns to tears, her friends rally to her side in her time of need. Crystal opens up about her health, expecting support from the women, but is stunned to face questions instead. Erika's patience is stretched thin when Kyle reveals Garcelle criticized her drinking. After a turbulent year, Diana and Asher plan for a more harmonious future.

As Dorit's charity dinner continues, Crystal addresses troubling rumors she's been hearing. Sutton objects to a hurtful label and drops a bombshell in return. The ladies boogie down at Lisa's disco event where Kathy keeps putting her foot in her mouth. Kyle tries to get Erika and Sutton to face the music. Garcelle is called out for pushing a narrative but stands her ground and then some.

Kyle charters a private plane and flies the women to Aspen in style, but Dorit packs emotional baggage along with her snow pants. The mountain weather isn't the only thing that's cold, as Garcelle and Sutton ice out Erika in a very public fashion. Kyle's ski chalet goes from cozy to creepy when Rinna summons the spirits with a Ouija board. Diana and Sutton's feud is rekindled after a combustible word leaves the ladies fuming.

The ladies hit the slopes in Aspen, where Dorit proves to be shaky on her skis. Sutton goes snowmobiling but is really revved up about Diana. Garcelle broaches a very touchy subject with Erika at dinner. Back at the house, Rinna wants everyone to chill out, but things get heated when Kyle and Crystal confront Erika about her perceived lack of empathy.

Kyle plans the perfect Aspen day, but tempers run hot after Erika gives her the cold shoulder. While Diana and Garcelle pick sides, Dorit finds herself caught in the middle. Crystal and Sutton go hat shopping, where flames get fanned when Lisa snubs Kathy. After tears and turmoil, the group tries to rally for a fun final night, but one woman's after-hours behavior ruins the night for everyone.

When Kathy skips the flight home from Aspen, whispers surface about a meltdown directed at Kyle that took place the night before. Back in Beverly Hills, Erika tells Dorit she's hurt that Garcelle talked behind her back and vows to say it to her face. Sutton and the others don flapper dresses for Crystal's swank Roaring 20s birthday party. However, when Kathy arrives as if nothing is amiss, Lisa heads for the exit, and Erika decides to share what she heard.

Erika throws a pop-up product launch where Diana receives a legendary phone call, but the hairiest situation remains the fallout from Aspen. While Dorit and Crystal question old friendships, Erika and Sutton build a new connection over fancy bubbles and casual biscuits. Kathy faces Kyle to apologize and move forward, but Lisa's arrival threatens the bonds between friends and sisters alike.

Garcelle celebrates her success with a big party and makes an even bigger purchase with some encouragement from Sutton and Crystal. Lisa's refusal to accept Kathy's apology leaves Kyle holding the bag for her sister. As the ladies are draped in diamonds at Kyle's charity gala, stories swirl in the tabloids and Dorit wonders if there is a leak in their circle. Erika and Lisa continue to call out Kathy, leaving Kyle to question if any of her friends can truly be trusted.

A surprise visit from a special guest kicks off the chicest Beverly Hills reunion yet. Dorit revisits trauma from her home invasion. Kyle, Lisa, and Erika challenge Crystal's contradictory statements about Sutton's "dark" comments. Garcelle admits to suspicions of bad deeds from some of the women, and tempers boil over when Kyle comes to Diana's defense.

As the reunion continues, Garcelle and Diana hit a point of no return in their already-frayed friendship. Sutton reflects on her ongoing tension with Lisa, who updates the women on her grieving process. Garcelle discovers the "trashy" truth behind Erika's book review. Meanwhile, as Kyle anxiously anticipates her sister's arrival, Kathy Hilton arrives with tequila in tow.

The reunion concludes as Erika is tasked with answering for her questionable decisions, both legally and otherwise. Kathy finally comes face-to-face with Erika and Lisa to confront their allegations over what went down in Aspen. Kyle gets drawn into the middle of a battle between her friends and her sister. Ultimately, the dynamic between Kathy and Kyle takes centerstage as the fate of their relationship hangs in the balance.