The finale kicks off with Lydia (Lisa Kudrow) and Paul Morgan (Ray Romano) locked in a spirited debate, pondering over the enigma of two distinct shell casings when Emily Morgan (Chloe East) had only pulled the trigger once. Their confusion deepens as they scrutinize the casings, each uniquely different from the other. Despite unearthing this peculiarity, Paul hesitates to proceed with the autopsy, while Lydia stands firmly in favor. Their divergent viewpoints escalate into a brief but intense spat, culminating in Lydia's heartfelt confession that she can no longer coexist with Paul due to his handling of their son Jacob Morgan's (Wyatt Aubrey) untimely demise.
Elsewhere, Carla Owens (Teyonah Parris) and Dennis Sampson (O-T Fagbenle) find themselves in the hospital, basking in the aftermath of their successful endeavor, when an eager Denise Sampson (Anna Maria Horsford) bursts in, arms laden with gifts. What starts off as a moment brimming with joy quickly takes a turn for the worse when Dennis brings up the revelation that Jimmy is not his biological father.
As JD Campbell (Luke Wilson) steps inside his home, his phone rings almost immediately, revealing a frantic Christine (Katie Walder) on the other end, inquiring about their daughter Harper (Joni Reiss). Simultaneously, Harper and Margo/Luann Starling (Linda Cardellini) are indulging in lattes within the confines of a luxurious suite. JD's voice remains as anxious as Christine's until he realizes that their conversation is being broadcast over speakerphone. Once they switch to a private line, JD spills the beans, revealing that Bobby Barnett (Rory Scovel) had confided in him. He further warns Christine that Bobby has found peace, and she will too, provided she ensures Harper's safe return.
Meanwhile, Sarah Weber (Poppy Liu) pays Carla a visit, intent on sowing seeds of doubt. She mentions casually that she and Leslie Fisher (Abbi Jacobson) had placed bets on the Morgan house, despite its tumultuous history. Carla's curiosity piqued, Sarah dives deeper, introducing her to the world of the Citizen App.
Upon returning from his visit with Nate Morgan (Kevin Alves), Mikey Morgan (Denis Leary) steps into his home to find Paul soundly asleep in his bed. A heated exchange quickly ensues, with accusations flying that Mikey has ruined Paul's marriage.
Paul, interrupting, inquires about the bullet casing, to which Mikey claims it originated from the kitchen floor. Paul, unconvinced, further escalates the argument, prompting Mikey to blame his relapse on Paul's absence during his prison term. To Mikey's astonishment, Paul confesses that he couldn't bring himself to visit, acknowledging his own assholery. Despite Paul's claim of having nowhere else to go, Mikey insists he leave, citing personal matters demanding his attention.
Meanwhile, Lydia is attempting to savor a quiet cup of coffee at home when Greg Boycelane (Matt Rogers) unexpectedly arrives with distressing news: the Sampsons have withdrawn their offer due to rumors circulating on the Citizen App. Though Lydia seems unaware of the app, she surmises it's linked to Jacob's demise. Greg offers no further details, but shortly after his departure, Lydia receives a call from the Chief Medical Examiner’s Office, informing her that her lawyer has already beaten her to collecting Jacob's autopsy report. This news catches Lydia completely off guard.
Lydia's intentions take an unexpected turn as she impulsively confronts Leslie about her unauthorized access to Jacob's records. Leslie stumbles over her words, apologizing profusely before managing to convince Lydia that her intentions were noble. The confusion deepens when Lydia panics upon learning that Jacob was felled by a .40 caliber bullet. Leslie gently prompts Lydia if there's anything she wishes to disclose, reminding her that she is now her legal representative.
As Emily was meticulously packing away Jacob's possessions, an unannounced visit from Margo and Harper threw her off guard. The air thickened with discomfort the moment Emily opened the door and casually instructed Harper to help herself to a drink from the fridge. With Harper momentarily out of sight, Margo, her demeanor contrite, confessed to Emily that JD was currently off his medication, a state she deemed unsuitable for Harper's company. Before Emily could formulate a response, Margo practically thrust Harper into her arms, announcing that she would return in four or five hours to collect her.
Elsewhere, Dennis and Carla found themselves house-hunting at the hospital, with Carla delicately broaching the subject of Denise. She employed a tactic of vulnerability, revealing how she had concealed her father's true identity—a billionaire womanizer who now sought reconciliation. This revelation seemed to strike a chord, prompting Dennis to contemplate reaching out to his mother, provided Carla did the same with her father.
Paul arrived home, flowers in hand and determination in heart, resolved to win Lydia back. However, his arrival coincided with Emily's presence, and mere moments later, Lydia stepped in to share the relieving news clearing Emily of Jacob's murder. Their joy was abruptly interrupted by Harper's announcement that they were running low on toilet paper, a mundane detail that clashed with the unfolding drama.
Margo's meticulously laid plans took an unexpected turn upon her return. JD, having gleaned information from Bobby, mocked her relentlessly, pointing out that despite the prenuptial agreement, there was scarcely a penny left for her to claim. To his astonishment, she declared her desire for the house to be in her name. He responded with a defiant threat, insisting he'd never allow it and demanding to know Harper's whereabouts. She, in turn, mocked him by asking if he intended to strike her if she refused to comply. Before he could react, Margo began striking herself repeatedly, accusing him of possessing a brutal left hook—a claim he fiercely denied, noting he had never laid a hand on her. Amidst this chaotic scene, Bobby arrived, unexpectedly supporting Margo's narrative despite JD's earlier rescue and hospitalization.
Back at the Morgan residence, Emily, Paul, and Lydia engage in a heated discussion, pondering the enigmatic appearance of Margo and her abrupt decision to entrust Harper to their care. Their musings are cut short by JD's unexpected arrival, demanding Harper's presence with an air of urgency. Mistaking their skeptical demeanor for discontent over a failed deal, JD's arrival escalates tensions. Sensing the conversation veering into unsavory territories, Paul interventionally instructs Emily to escort Harper upstairs to her room. As Harper passes Lydia, the latter invites her to tinker with Jacob's keyboard, to which Harper reluctantly admits ignorance, despite claims of year-long lessons from Jacob. The truth unfolds: Jacob had only provided a solitary lesson, with subsequent visits being mere excuses to spend time with Margo.
Meanwhile, at her abode, Margo admires her handiwork when the front door creaks open, triggering the alarm. She calls out to Bobby just as the narrative swiftly pivots back to JD, whose passions are ignited. JD insists that this is the first he's hearing about Margo and Jacob's camaraderie. Paul, seeking a private confrontation, entices JD into the attic, while Lydia's true identity as Margo's guest is revealed. JD vehemently denies harming Jacob, while Margo confesses Jacob's infatuation but denies any intimate involvement. The dual confrontation deepens as Margo fabricates a tale of Jacob's theft, claiming JD caught him and acted in self-defense. Amid her deceit, Margo reaches for a weapon, only to be outmaneuvered by Lydia, who swiftly draws a 9mm. Lydia departs with Margo's purse, returning home as Paul uncovers the truth independently. Lydia cautions him against impulsive actions and vows to consult her lawyer. As she dials, Paul retreats to Jacob's room, where he offers heartfelt apologies and reminisces about cherished childhood moments. He also humbly requests Jacob to speak kindly of him to Lydia, should the occasion arise. Overhearing this, Lydia quizzically inquires why he doesn't broach the subject with her directly. Paul confesses his love, to which Lydia responds with heartfelt gratitude.
Elsewhere, Sarah and Leslie exchange insights on their findings concerning the Morgan case and residence, while Carla and Dennis unwind at home, opening baby gifts. Dennis chuckles at a message from Carla's father, included with one of the presents. Carla remains less amused, but as she attends to their crying newborn, Dennis discovers a shocking revelation: a $5 million check tucked inside. Choosing discretion, Dennis decides not to share this discovery with Carla.
With Paul's assistance, Mikey returns Lydia's piano as a gesture of repayment for the detox they underwent. When Lydia inquiries about the intricacies of their endeavor, Paul dismissively mentions a substantial donation to the USC Shoah Foundation, reassuring her that they'll recoup their losses when they eventually sell the house. However, it's Lydia's turn to be astonished when she reveals that she has already put the house on the market.
The narrative swiftly shifts to Margo, who is soaking in a bath, seething over Lydia's earlier insult. Her fleeting memory gradually unfolds the harrowing tale of Jacob's demise. It transpires that Jacob broke into Lydia's house to reclaim the jewelry he had gifted her. In a heated confrontation, Lydia threatens to expose him as a thief to the entire neighborhood, while he counters by threatening to reveal their affair to JD. As Jacob flees, Margo trails him to his home and shoots him with JD's .40 caliber pistol as he tries to slip through the kitchen door.
As the memory fades, JD and Margo's house inexplicably bursts into flames, with Margo still immersed in the tub. She screams for help, while JD is shown calmly driving down the highway in his car, indifferent to her plight.
The story leaps forward six months, revealing that Dennis has completed his third book, "Ghosts of Our Forefathers," dedicating it to his father, Jimmy. In a subsequent conversation with Carla, they reveal that they are the new, proud owners of JD and Margo's former house. With Dennis's literary success, they now have the chance to build their dream home. Denise briefly joins the scene, announcing that she has moved in to help with the baby. When Dennis is alone, he receives a text from Carla's father, confirming that the check has been cashed and expressing his desire to see his grandson.
Sarah and Leslie celebrate the christening of their baby's new room, enjoying the serene view of their Mandarin tree. Though Margo survived the house fire, she bears a scarred right side of her face. However, this imperfection will soon be irrelevant, thanks to Nate. JD fulfills his dream of portraying a cowboy, while Lydia and Emily perform a duet composed by Jacob. Paul admires their rendition from a table, as a flickering light casts an eerie glow over the scene.
