Schwartz and Sandoval throw a progress party to show off their new bar to their friends; Lisa, Ariana and Katie brainstorm ideas for their sandwich shop; Scheana embraces signing a prenuptial; Brock's attempt to hold James accountable backfires.
Ariana and Katie meet with Randall about investing in their sandwich shop, while Sandoval gets cold feet about helping Brock with his latest scheme to marry Scheana; the gang heads north to a beautiful winery in Santa Ynez.
On the eve of Raquel and James' engagement party, Scheana and Brock make a big announcement that sends shock waves through their friend group, and Sandoval confronts Lisa about her lack of support for the Toms' new bar.
Katie and Schwartz attempt to maintain a friendship in the wake of their recent divorce; James introduces his new girlfriend, Ally, to the rest of the group; tensions between Schwartz and Lala bubble over when one of them commits an act of betrayal.
Raquel cozies up to Peter in an attempt to get over James; Lala opens up about the origins of her last relationship; James throws Raquel under the bus to Lisa; Katie comes face to face with the bar that led to the demise of her marriage.
Lala drops a bombshell on Raquel that shakes the foundation of their newfound friendship; Sandoval takes some time away from the bar to play rock star with his cover band; Ariana and Katie take the next step in opening their sandwich shop.
James finds himself at the center of the rumor mill when he gets kicked out of a nightclub while fighting with Ally; Katie tries to keep her ex in line with another ultimatum; Tom and Tom host a friends-and-family event at Schwartz and Sandy's.
Katie plans a divorce party trip to Las Vegas and Lake Havasu but conveniently leaves Scheana off the guest list; Lala and Raquel find themselves flirting with the same guy; Ariana receives devastating news from home.
Lala and Katie freak out at Raquel for making out with Oliver; Scheana plans a guy's night to help Schwartz get back in the game; Tom and Tom weigh a big decision about the future of their bar; Lisa consoles Ariana about her loss.
James starts to spiral when he feels that his friends are choosing Raquel over him; Lala breaks her years-long dry spell when she hooks up with a new guy; Katie and Scheana clash over a hotel room snafu.
Lisa and Ariana plan a surprise bridal shower for Scheana; James makes it his mission to score Ally an invitation to the wedding; Raquel and Schwartz take their flirting to the next level; the group travels to Cancun to celebrate Brock and Scheana.
Katie and Schwartz celebrate a milestone in their breakup with an extravagant dinner that quickly goes south; Scheana erupts on Lala for skipping wedding events to avoid Raquel; James must atone for his behavior when his temper gets the best of him.
Scheana and Brock marry in a lavish ceremony in Cancun; James and Katie must sort through their feelings after their exes hook up with one another; Lisa attempts to solve the Toms' problems; Lala puts Raquel in her place.
Back in Los Angeles, Lala celebrates her birthday with an epic party. Raquel sets her sights on Oliver after being rejected by Schwartz. Tom and Ariana discuss their plans to make embryos together. Ally and James witness a suspicious interaction between.
Sandoval opens up to Schwartz about his romantic problems with Ariana; Scheana blames Katie for spreading a sordid rumor about some of their friends; Ariana suffers another big loss; James plans an epic beach day that takes a turn for the worse.
Raquel's birthday dreams come true when she embarks on a glamping trip with some of her closest friends; Lala grows suspicious about Sandoval's interest in Raquel; James and Ally attempt to work out their issues following a disastrous beach day.
Ariana and Katie host a preview party for their sandwich shop; James takes an exciting step forward in his career; Tom and Ariana have a serious talk about the state of their relationship; Raquel confronts Katie for rage-texting Schwartz.
Cameras pick back up after Ariana discovers that her boyfriend of nine years is having an affair with one of her best friends; Schwartz panics when the scandal threatens to upend their business; Sandoval comes clean with another shocking secret.
Stassi returns from Vegas to find that SUR has changed, and Katie and Kristen have turned against her; Lisa calls a meeting to end the fighting; Scheana prepares for her first performance at the Roxy.
Lisa organizes a photo shoot for SUR's staff; Scheana tries to earn Lisa's respect back; Kristen and Stassi try to make up; the truth about Jax is revealed.