Lizzie and Olivia arrive at the ranch after walking from the front gate. Olivia carries a handgun. When they see a light in the window of Rebecca’s bathroom, Olivia stops Lizzie from rushing into the house. Hiding behind hedges, they watch Rebecca and Marsden emerge from the house and head toward the barn, seemingly arm in arm. Lizzie mistakenly believes they are lovers who conspired to kill Grayson. 

Peering through a barn window, they see the pair in the hayloft and mistake their proximity for intimacy. Then Lizzie spots the rope around Rebecca’s neck just as Rebecca kicks Marsden off the ledge, sending him falling to the ground while she is left hanging by the noose. Marsden lands on his spine and falls silent. Rebecca hangs from the noose, gasping, her fingers wedged under the rope to keep from breaking her neck.

Olivia rushes into the loft and cuts the rope with a knife while Lizzie positions hay bales below and climbs atop them. When Olivia severs the rope, Lizzie breaks Rebecca’s fall. Marsden regains consciousness with his neck twisted and his back clearly broken. Olivia wordlessly places the gun in his hand and guides it into his mouth, looking to Rebecca for approval. Rebecca whispers to Olivia to do it. Olivia uses Marsden’s finger to pull the trigger, killing him.

Detective Jim Walsh interviews Veronica; by this point, he knows that Marsden killed Grayson. Veronica explains that Marsden was obsessed with and jealous of Grayson their entire lives, constantly competing over everything. She mentions the rumors of her affair with Grayson, which she denies. Walsh confirms police found photographs of Veronica hidden under Grayson’s bed. Veronica claims Grayson took them without her knowledge and sent her inappropriate emails over the years that she never answered. 

Veronica suggests a narrative that the video footage (which the detective has seen) supports. Marsden confronted Grayson in a jealous rage and killed him after the camera footage cut out. Then, a few days later, overwhelmed by guilt, Marsden returned to the barn and killed himself. Veronica confirms that the gun found at the scene belonged to Marsden.

More than a year after Grayson’s death, Rebecca marries Dan in a large, sponsored wedding orchestrated by Olivia to relaunch her brand. Rebecca is six and a half months pregnant; Dan is delighted to combine their families and supportive of her career ambitions. Rebecca has not told him that James is also his biological child and that her eldest five were fathered by Marsden, nor does she plan to. 

Lizzie is the matron of honor at the wedding; Olivia also brokered Lizzie’s seven-figure book deal about the murders, which is set to be published next month. Lizzie’s profits have allowed her to stop writing for Modern Woman and launch a new and more fulfilling career as a true crime writer. Meanwhile, Peter has also sold his first novel in a deal brokered by Olivia. Veronica, now calling herself Ronnie, officiated the ceremony and is auditioning for a reality show. Rebecca reflects that both she and Veronica were trapped by their husbands. 

Rebecca acknowledges she does not question Olivia’s behind-the-scenes manipulations because Olivia makes her feel safe and powerful. Her hands bear permanent nerve damage from fighting the noose. After Marsden’s death, Olivia brought in the FBI and provided the camera footage (claiming it was from a security camera). Rebecca claimed she had delayed showing the footage to anyone because she feared police corruption and repercussions. Although the footage did not capture the actual murder, the violent struggle between the two men made it seem clear that Marsden killed Grayson. Rebecca’s brand as a survivor and entrepreneur thrives, and she considers running for Congress. She is planning to name her unborn child Elizabeth, after her loyal best friend.

Lizzie deleted her Instagram account after the traumatic events, no longer wanting to participate in social media performance. Her publisher was concerned about her inability to promote the book, but Olivia promised they would sell it on Rebecca’s platforms. Lizzie reflects that Olivia has orchestrated success for everyone—herself, Rebecca, and Veronica—while remaining terrifyingly powerful and unknowable. The Smith triplets now own the hotel outright, another Olivia achievement. While interviewing Veronica for her book, Lizzie became much more compassionate, although she still feels wary.

At the wedding reception, Veronica makes a comment to Lizzie about writing a book focused on Dr. Carmichael (the OB-GYN who treated both her and Rebecca). Lizzie has never learned the secret about the paternity of Rebecca’s children and is confused about why this would be an interesting topic. Veronica explains that she has always wanted a daughter, but every time she was pregnant with a girl, she would lose the baby. Lizzie is astonished by the insinuation that Dr. Carmichael played a role in these losses. Veronica calmly tells Lizzie that there are enough secrets in the local community to keep Lizzie successful for a long time. 

Lizzie is left questioning how much Olivia knew about the murders and when, suspecting she manipulated both women throughout. She vows to eventually confront Olivia for the full truth. Watching Olivia with one of Rebecca’s children, Lizzie cements her view of Olivia as the puppet master pulling everyone’s strings.

Veronica confesses that Grayson would still be alive without her intervention. She reveals she is a self-taught hacker who used spyware to monitor Marsden’s communications for years. As a result, she saw Rebecca’s message to Marsden with the DNA test results and the contract severing parental rights. Veronica was furious but unsurprised, as she had long suspected Dr. Carmichael of interfering with her health and the health of other women he treats. Veronica also saw the message Rebecca sent Marsden with the emails from Grayson, and this angered her. When Marsden confronted Veronica, she denied any affair and begged him not to meet with Grayson (knowing this would encourage him to do the opposite). 

Veronica has a traumatic history involving both men. When she was 12 (and Grayson and Marsden were 18), they forced her into a shed where Grayson sexually assaulted her while Marsden forcibly kissed her. Veronica told her mother about Marsden kissing her but was too ashamed to add what Grayson had done. Because Marsden kissed her, her father considered her to be defiled and began planning for her eventual marriage to Marsden (since she now belonged to him). Veronica confesses to murdering her father years later by smothering him with a pillow.

On the night of the murder, Veronica drove Marsden to the ranch, relishing the prospect of him beating Grayson. She waited outside but eventually entered the barn where Grayson was barely conscious and badly beaten. Marsden was weeping and suggested calling an ambulance; he also explained about breaking the camera. Veronica sent Marsden to deal with the camera (it had stopped recording, so none of this footage was captured) and impaled Grayson on the harvester blades herself. She then severed his right hand with an ax—the hand that had assaulted her—and hid it in a freezer.

Veronica reveals the full extent of her plotting in the aftermath of the murder. She confided in Olivia, explaining that she wanted to blackmail Marsden for his role in the crime and secure a divorce. Olivia told her to wait, promising to make the violent events lucrative and beneficial for both Veronica and Rebecca. However, Marsden became fixated on killing Rebecca, and Veronica was happy to go along with this plan. She took photos of herself, went to the ranch, and planted them to give the appearance that Rebecca found the photos and killed Marsden out of jealousy (Veronica was the one in the house on the day that Lizzie hid in the bathroom). She organized the desert dinner to create an alibi for herself during the period when Marsden was kidnapping Rebecca, and after confiscating the phones of all the guests, she installed spyware on every influencer’s phone, which allowed her to track Rebecca through Katie’s texts.

Although the plan went awry and Marsden (rather than Rebecca) ended up dead, Olivia reassured Veronica that they could pivot and conceal any involvement on Veronica’s part. After Olivia facilitated what would be reported as Marsden’s death by suicide, she instructed Veronica to confirm the gun was his. In exchange for eliminating Marsden, Veronica provided Olivia with all the data scraped from the influencers’ phones. In the wake of her husband’s death, Veronica has the power and freedom she has long craved. She has ambitious plans for her future, and she and Olivia work closely together; for example, Olivia was the one who proposed telling Lizzie about Dr. Carmichael. The epilogue ends with Veronica, Lizzie, and Rebecca posing for a photo while laughing together.