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.

Three women living in three different decades: a housewife in the '60s, a socialite in the '80s and a lawyer in 2019, deal with infidelity in their marriages.

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 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 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. Season finale.