The third episode of "Grosse Pointe Garden Society" unfurls in a future scenario where Catherine unveils to Birdie, Alice, and Brett the grand design of their impending home. Their faces register concern for her mental stability, particularly when she announces that Quiche’s remains will be interred outdoors, becoming an integral part of this new abode. The revelation stirs curiosity: who will be occupying this house? The answer is Birdie.
As night descends, they embark on the surreptitious task of relocating Quiche's grave within the garden's confines, only to find themselves struggling to pinpoint the exact burial site. Looming over them, it seems, is an unseen observer from within a parked car. Realizing the need for a coherent strategy, Brett proposes they leave Quiche undisturbed until suspicions wane. Yet, unknown to them, Brett is already under surveillance. He eventually seeks refuge with Alice for the night, but their pursuer remains relentless, parked outside their hideout.
Confronting the mysterious follower, Brett discovers to his astonishment that the orchestrator of this charade is none other than Connor and Melissa. They have employed a private investigator to uncover dirt on Brett, aiming to seize full custody of their children. This revelation casts a shadow of doom, suggesting that their initial act of burying Quiche might also come to light.
Switching to the present timeline, Catherine confesses her infidelity to her husband, Tucker. To her amazement, Tucker receives the news with an eerie calmness, sipping his scotch as he grapples with the extent of her betrayal. He ultimately shrugs it off, granting her forgiveness with a nonchalance that puzzles her. Catherine wonders if Tucker's indifference hides his own infidelity, especially when he subsequently prepares her breakfast in bed with uncharacteristic tenderness.
At the garden society meeting the following day, Birdie lends credence to the suspicion that Tucker is the true villain, using Gary as a scapegoat to divert attention from his own misdeeds. Prompted by this theory, Catherine embarks on a clandestine search for evidence at Tucker's office, only to return empty-handed. Caught red-handed by Tucker, she struggles to come up with a plausible excuse.
Elsewhere, Alice struggles to look at Doug, convinced of his guilt in their dog's demise. She decides that couple's therapy is the only way to unravel the tangled emotions between them. During the session, Alice confronts Doug about his aversion to Molly. He confesses that he inadvertently left the gate open on the fateful day she went missing. However, Alice's revelation of the gun and bullet takes the conversation to a whole new level of tension.
It transpires that Doug has been guarding a secret ever since the neighboring break-in – a cherished keepsake entrusted to him by his father to safeguard. The revelation doesn't sit well with Alice, who levies accusations that leave Doug feeling resentful and eventually prompting him to trudge home after his therapy session. Undeterred, Alice enlists Brett's help, arming him with a metal detector to track down the bullet Doug had tossed over the fence in a fit of pique.
Elsewhere, chaos ensues at the garden society as Ford, working off a debt to Birdie, gets stung by a bee. In a desperate bid, Birdie impersonates his mother at the hospital, only to be astounded by the news that Ford needs to stay overnight. Matters grow embarrassingly complicated when his real parents arrive, revealing Joel Thomas as Ford's foster father.
Meanwhile, tension flares between Brett and Connor over their children's well-being. Connor expresses a desire to take them fishing, necessitating a switch in their weekend custody arrangement. Brett, willing to do what's best for his kids, reluctantly agrees. However, his heart sinks as he stumbles upon online photos of his children enjoying a fishing trip – a memory he yearned to create with them.
That evening, Catherine engages in a heartfelt conversation with Tucker, who confesses that his leniency towards her stems from a realization: he had stopped appreciating his good fortune in having her. Seeking redemption, Tucker vows not to punish her, and they appear to reconcile.
As for Doug, he decides to part ways with Alice and seek refuge with his parents. The episode draws to a close with a flashback to the "Six Months Later" timeline, where Brett visits Melissa and learns to his dismay that she has filed for emergency custody. Sensing Brett's recent unraveling, Melissa's actions leave their future hanging by a thread.
Elsewhere, Gary finds himself abducted by an unseen assailant in a speeding van, disappearing into the uncharted territories of anonymity. Whether this harrowing ordeal precedes or succeeds the heinous act of homicide remains shrouded in uncertainty. Nevertheless, the murder catches the attention of the authorities, prompting them to intercept Brett the following day at the lush garden center. They grill him intently, inquiring if he is acquainted with anyone from the "exclusive and opulent garden gala."
