Lisa learns about Lala's financial arrangement with her wealthy boyfriend; Jax celebrates his birthday with a hilarious game of trampoline dodgeball; Stassi, Katie, and Brittany try a new strategy to get over a hangover; Schwartz and Jax volunteer to build a house, but find manual labor isn't their strong suit; James sheds new light on his former romance with Lala; and Schwartz and Sandoval secretly meet up with Scheana's ex-husband.
In the season finale, Sandoval and Schwartz give their friends a sneak peek at TomTom, but a cloud hangs over the party as Lisa must decide Jax's future at SUR; Scheana makes a last-ditch effort to connect with Rob; James receives big news about his DJ career; Stassi introduces Lisa to her boyfriend with awkward results; and Brittany unleashes three months of pent up anger and frustration at Jax.
After a painful breakup, Brittany bounces back with her sights set on a new man; Ariana blows up at Sandoval for choosing to support Jax over spending time with her; Lisa gives Stassi relationship advice; Kristen tries to convince Carter of her loyalty; and Lala takes the stage with James for a musical performance.
Ariana and Brittany seek relationship advice from Lisa; Stassi throws a party to relaunch Katie's beauty blog; Kristen's boyfriend, Carter, questions Sandoval about her night in Mexico with James; Katie and Tom celebrate their first wedding anniversary; and Jax and Brittany's relationship takes a surprising turn.
After returning to L.A., Kristen must tell her boyfriend about the night she spent with James. Sandoval convinces Lisa to throw a "progress party" to show off the TomTom space, and Jax confronts Brittany's admirer. Tensions finally come to a head at SUR, where Jax has an epic meltdown in front of staff, customers, and Lisa herself.
James takes over the DJ booth at a Mexican club. Jax confronts Scheana. Lisa adopts a new dog. Schwartz horrifies Katie with a drunken blackout. Stassi realizes her relationship is in trouble. Kristen and James share a night on the beach, and the rumor mill works overtime.
The Mexico adventure continues as the group explores a natural water park, Playa del Carmen nightlife, and a little local spot called "SUR." James tries to remain in Jax's favor by exposing Scheana's role in hooking up Brittany with the hot new barback; Stassi and Kristen clash over Kristen's vacation meltdowns; and Lisa predicts that a volatile romantic triangle at SUR will end explosively.
Brittany tries to get her relationship back on track by taking the group to Mexico for Jax's birthday, but Jax blindsides Brittany by saying he is considering moving to Florida for a job. James delights in being invited on Jax's trip. Sandoval and Schwartz finally impress Lisa by creating innovative cocktails for TomTom. Stassi and Lala take Jax to task for always putting his needs above Brittany's.
Brittany spoils Jax on his 38th birthday; Scheana sets Brittany up with SUR's hottest new model and bartender; Ariana's brother asks out new SUR hostess Billie Lee; James has an emotional reunion with his Dad; and Sandoval and Schwartz must redeem themselves with Lisa after a disastrous Vegas business trip.
Lisa takes Sandoval and Schwartz on a business trip to Las Vegas to design their new bar, but when the guys focus more on partying than professionalism, Lisa questions the whole partnership. Meanwhile, Brittany tells Katie and Ariana she needs to take a pregnancy test, and everyone is shocked by Jax's reaction to the results. Back in L.A., Lala reaches out to former frenemy, Stassi, to help plan her debut musical event.
In Big Bear, Jax cheats death when an attempt to show off goes horribly wrong. Raquel questions whether James still harbors romantic feelings for Lala; Ariana gets upset when Sandoval doesn't invite her on a business trip to Las Vegas; and Rob reveals that he doesn't tell Scheana he loves her providing Jax with fresh gossip to spread. Back in Los Angeles, Stassi interviews Lisa for her podcast; and Katie and Schwartz share date night.
Lisa channels all her energy into restoring SUR after the devastating fire; Stassi consults a tarot card reader about her future with Patrick; Scheana invites a select group of friends to visit Rob's prized cabin in Big Bear; James makes a startling admission about his feelings for Lala; and Jax feels left behind in the wake of Tom and Tom's success.
Birthday twins and perpetual rivals Stassi and Ariana plan extravagant parties on the same night, but while Ariana shines as the belle of the ball, an embarrassed Stassi runs off in tears. Meanwhile, Schwartz and Sandoval celebrate the approval of TomTom's permits by writing hefty checks; Lisa punishes Jax for ruining her big night; and Sandoval and Ariana work through their intimacy issues.
Stassi helps organize a party to honor Lisa Vanderpump's new role at Beverly Hills Lifestyle magazine, but struggles to convince her bitter ex-coworkers to lend a hand; Schwartz's triplet brothers come for a visit and a Tom Sandoval makeover; Jax's anger issues send him running back to reiki therapy; Katie finds herself the victim of body-shaming comments; and Lisa must find a way to reopen SUR after a fire nearly puts the restaurant permanently out of commission.
Kristen tests Jax's patience when she flies out Brittany's mom for a visit; Lala finds her inner feminist and schemes to repair Scheana and Katie's friendship; Lisa rewards Peter for years of loyal service; and a salacious rumor about James and his best friend makes the rounds at SUR.
Scheana spirals out of control when she suspects Rob is pulling away, forcing Lisa to come to her rescue; Stassi assists in dressing the staff for SUR's annual Gay Pride celebration; James erupts on Lala after she insults his girlfriend; and Jax turns to an unlikely form of therapy in order to come to terms with his anger and infidelity.
Ariana's role in releasing Jax's audio recording leads to a fight with Sandoval that threatens their relationship. Scheana and Katie agree to stay out of each other's relationships. At SUR, James hustles to make sure his first DJ event is a success, Lisa marvels at Brittany's dedication to Jax, and Lala bonds with Billie, the restaurant's new hostess.
Jax convinces Brittany to host a housewarming party in an attempt to prove their relationship is mended, but the evening devolves into madness when a devastating audio recording surfaces. Lisa and Katie take Schwartz to task after his latest drunken blackout, while Kristen must tell Scheana that her boyfriend Rob may not be as perfect as he seems. Finally, Ariana reveals the heartbreaking reason for her body image struggles.
Lala learns Katie has been talking about her relationship again. Schwartz and Sandoval make a big investment. Stassi struggles as SUR's new event planner. Jax and James forge an unlikely friendship with the help of some absinthe.
Brittany's girlfriends put aside their differences and throw a Kentucky-themed party to help cure her heartache, but the group learns Jax's indiscretion may not have been a one-time thing. When Ariana gets thrown off of her horse during practice, she must learn how to get back in the saddle. Lala returns to SUR to ask for Lisa's forgiveness-and her old job.
A painful revelation makes Brittany flee L.A. Stassi reconnects with Patrick and Lisa Vanderpump, while James tries to reclaim his DJ job at SUR. Lisa serves as grand marshal of the Long Beach Gay Pride parade, where Sandoval discovers a new fetish.
Scheana throws a birthday party to show off her new boyfriend, but things get tense when she leaves Katie and Stassi off the guest list. Sandoval jeopardizes his and Schwartz's new partnership with Lisa when she overhears him complaining about her management style. A harsh rumor circulates that could damage a relationship.