One Pasadena, Calif. house serves as the focal point for three decades worth of marital strife. In 1963, Beth Ann's life as a doting housewife is upended when she learns of her husband Rob's infidelity. In 1984, socialite Simone is blindsided by her husband Karl's devastating secret. In present day, high-powered lawyer Taylor has an open marriage with husband Eli.
Beth Ann's scheme to drive Rob away from April brings her closer to the mistress; Simone and Karl try to keep up appearances at a gala, but Tommy gets jealous; Taylor is forced to confront the true nature of her feelings for Jade.
Beth Ann's walk on the wild side with April leads to an interesting dinner party with Rob's boss; A visit from Simone's daughter Amy threatens to derail Tommy's plan; Taylor, Jade and Eli get mixed up with Jade's crazy ex-boyfriend Duke.
Beth Ann's budding friendship with April leaves her feeling conflicted, just as she is beginning to win back Rob's attention. Simone and Tommy get stuck in a precarious situation, leaving Simone to call on an unexpected source - Karl - for help. With Taylor out of town, Eli and Jade's relationship enters new territory when she helps him with his script.
Beth Ann and Rob throw a housewarming party to introduce themselves to the neighborhood, but something seems to be amiss with neighbors Mary and Ralph. Hijinks ensue and secrets come to light when Simone and Karl have dinner with Amy’s conservative future in-laws. Tensions rise in the throuple after Taylor begins to question the living arrangement and reveals a dark truth about Eli.
Beth Ann is elated when Rob ends his affair, but that feeling is short-lived when Beth Ann learns that everything is not as she thinks. While Simone and Karl work to find common ground in their relationship, conflict ensues as Naomi grows suspicious of Tommy's erratic behavior. Eli, Taylor and Jade try to work out their issues by heading to a polyamory retreat but Eli's relapse with addiction may derail everything.
Beth Ann recruits Sheila to help pull off her faux diagnosis, taking her already far-fetched plan another step too far. As Simone and Tommy arrange their European rendezvous, a revelation may foil their plans. Taylor reaches out to Jade in hopes of helping Eli battle addiction, but his new found riches have Jade only seeing green.
As Beth Ann plots to remove April from Rob's life for good, a surprising confrontation reveals a secret that will shock Beth Ann to her core. Meanwhile, Naomi is reeling with anger and will do anything to protect her son, even if it means destroying Simone and Karl's reputation along the way.
Kill or be killed, that is the question. After learning the shocking truth about her daughter's death, Beth Ann devises a plan for revenge that could alter the course of many lives. As Karl's health worsens, Simone's commitment to their relationship is tested. With Jade out of the picture, Taylor and Eli are focusing on their love story, and are hopeful the past is far behind them.
With dreams of status and glamour, Alma Fillcot hopes to fill a recently vacated seat in her local Garden Club, led by the intimidating Rita Castillo. However, when Alma discovers her loving husband Bertram's shocking secret, all of that preparation and hard work is jeopardized.
A shaken Alma investigates Bertram's disturbing collection of “souvenirs,” determined not to let this discovery complicate her Garden Club aspirations. Meanwhile, Rita is still suspicious of Scooter's devotion and is further aggravated by the arrival of Catherine, her ailing husband's daughter.
After Alma is tipped off that the Garden Club will make a surprise visit to her home, she persuades Bertram to help her prepare despite the police investigation of their missing neighbor next door. Heartbroken, Dee seeks comfort in Vern.
Newly widowed, Rita's elation is short-lived when Catherine questions her innocence in Carlo's death, much to Alma's delight. Dee introduces her parents to Vern at a dinner with multiple shocking revelations.
As Alma celebrates finally being admitted into the Garden Club, Bertram mourns the loss of the old Alma. Isabel uses her recent discovery to her own advantage and Dee grows suspicious from conflicting information surrounding Mrs. Yost’s disappearance.
Three weeks have passed and Alma, now very comfortable with her position in the Garden Club, decides to run for the vacated presidency. With Isabel's demise, Rita is freed from jail and Bertram grows more guilt-ridden and depressed, while Vern pursues the truth.