Hadley Grace, an FBI agent from Logan’s team, arrives at Lana’s home and confronts her for stealing the identity of Kennedy Carlyle, a girl who supposedly died in a car accident 10 years prior. Maintaining her composure, Lana delivers a rehearsed story: She is Kennedy, but after surviving the crash, she got sober, legally changed her name, and underwent extensive facial reconstruction surgery, which explains her different appearance. She challenges Hadley’s motives, dismissing her as a jealous colleague trying to interfere in her relationship with Logan. Hadley threatens to expose her to Logan, but Lana calls her bluff, stating she will show Logan her surgery records and then end the relationship herself if he makes her feel as violated as Hadley has. After Hadley leaves, Lana reflects internally on her multiple identities—Victoria Evans, Kennedy Carlyle, and Lana Myers—before calling her best friend, Jake, to tell him that Hadley has become a problem.

At a new crime scene, Logan is enraged to find that the serial killer known as the Boogeyman has left another body with Logan’s name carved into it. He realizes the killer is now personally taunting him, which puts Lana in grave danger. His colleague Donny agrees that Lana will be the killer’s primary focus. Another team member and Logan’s ex-girlfriend, Lisa, asks who Lana is. Logan orders protective detail for Lana and the other female agents on the team. They receive a lead that the suspect, Gerald Plemmons, has been spotted downtown, and the director issues a shoot-to-kill order.

Two police officers are now stationed outside Lana’s house, which she finds annoying as their presence complicates her plans to target her next victim. From her hidden “murder room,” concealed behind a bookcase, she watches them on surveillance cameras. Logan soon arrives with two colleagues—an unnamed male and a hostile Lisa. Logan kisses Lana passionately in front of them before taking her to the bedroom to talk. He tries to convince her to let an officer stay inside the house for her safety. She initially refuses, openly revealing a deep distrust of law enforcement that contradicts Logan’s initial profile of her. However, to appease his worry, she eventually agrees to let someone he trusts stay inside. After he leaves, Lana returns to her murder room and studies a wax apple pierced with seven nails, with many more still to go.

Two days later, Logan learns from Donny that two men from Delaney Grove, Lawrence Martin and Tyler Shane, have been reported missing. The cases are unusual as the men don’t fit the established victim profile of single males living alone in isolated homes. Logan calls Lana, who says she is working out with Detective John Duke, the officer assigned to her house. Logan is surprised and jealous; he had arranged for an older officer, but Duke is a young, ambitious, and single homicide detective. Annoyed, Logan decides to drive to Lana’s. On the way, his colleague Hadley calls with a potential lead, but Logan, wanting to see Lana and needing rest, tells her to give the information to Donny.

Lana spars with Detective Duke, easily feigning weakness while assessing his amateurish fighting style. Duke demonstrates a chokehold against a wall and tightens his grip just as Logan arrives. Lana’s reflexes take over, and she strikes Duke in the throat. After a tense exchange between the two men, Logan, clearly exhausted, falls asleep in Lana’s bed. Lana asks him about Hadley, and he explains that she is like a sister to him and is gay. Hours later, Logan’s alarm wakes him; the Boogeyman has left another body with the words “You can’t” carved into it. As he showers, he discusses the case with Lana, who offers sharp insights into the killer’s mindset. After he leaves, Lana has a vivid flashback of the brutal assault she endured, reinforcing her commitment to her mission of revenge.

Two days later, Hadley provides a forensic lead pointing to the Boogeyman’s hideout in an abandoned factory. Logan, Donny, Lisa, and Elise race to the location. Lisa and Elise take the lead in their SUVs while Logan and Donny fall behind after stopping for gas; Logan calls Elise to hold until they arrive. A short time later, they discover the women’s overturned SUV, which has been T-boned by a large truck. Both women are injured but alive. A panicked Lisa explains that the Boogeyman hit them, came to her side with a gun, then broke her window and used the glass to carve the word “KEEP” into her arm; she grabbed her spare gun when he dropped her arm to retrieve his own and shot him twice, grazing him. She adds that he had a girl with him. Logan realizes a truck that passed them minutes earlier was the killer’s and that someone must have tipped him off about the raid.

At the hospital, the team learns that Lisa and Elise will recover from their injuries. Lana arrives with Duke trailing behind her, frantic with worry for Logan. She rushes into his arms, but Logan, furious that she has exposed herself to danger, drops her to the ground and pushes her away. He yells at her for coming to a place where the killer might be watching and directs much of his anger at Duke for being unable to “restrain” her, accusing him of seeking a high-profile arrest. Hurt and angry, Lana responds with unexpected calm, reminding Logan of every precaution she has taken for his sake: “You told me to have a protective detail, and I agreed […] I’ve sat in a protective bubble, answering all your calls and texts promptly so you don’t worry about me” (157). She reminds him that he failed to offer her the same courtesy by letting her know he was safe. She leaves, telling him he has no right to talk down to her. Logan realizes that he “fucked up.”

Infuriated by Logan’s behavior, Lana leaves the hospital and orders the police detail off her property. She drives to a secure warehouse, switches to a different car, and calls Jake on a burner phone to tell him her relationship with Logan is over. Jake provides the information she requested about Hadley, revealing that Hadley’s stepfather, Kenneth Ferguson, likely molested her as a child. Ferguson is now a social worker with access to vulnerable children. Jake initially refuses to help, insisting they stick to their specific list. After Lana argues at length that Ferguson is an active danger to children, Jake relents and texts her Ferguson’s address.

Logan interrogates Lee Norris, the local SWAT commander, who confesses to leaking the raid plans to the Boogeyman, Gerald Plemmons. Plemmons kidnapped Norris’s 20-year-old daughter, Erica, and was holding her hostage. Meanwhile, Craig, a senior agent, informs Logan that the local police chief intentionally alerted Duke about the attack on the agents, knowing Lana would rush to the hospital and expose herself as a potential target for Plemmons. The team is unable to locate Lana, who has disabled her car’s GPS and removed her phone battery. Craig notes explicitly that these privacy measures resemble patterns a sex-crimes colleague associates with abuse victims, though Logan internally dismisses the parallel. They realize they are being manipulated by a highly intelligent killer.

Lana tortures a confession out of Kenneth Ferguson before killing him and disposing of his body in a nearby body of water. She discovers his collection of Polaroids depicting dozens of child victims. To spare Hadley the public humiliation of the photos being discovered, Lana takes the one of Hadley as a child. She also takes a nail from Ferguson’s house as a trophy, noting it is out of her usual routine since he was not on her list. Following information from the confession, Lana finds a young girl named Laurel, another of Ferguson’s victims, locked in a shed. She takes Laurel to the home of Lindy May, a woman from Delaney Grove who tried to help Lana and her brother years ago. Lindy is shocked to see Lana is alive and agrees to care for Laurel. Lana instructs Lindy to come forward and reveal Ferguson’s name so police can find the buried children without Lana identifying herself. Laurel, feeling safe, asks her “angel” to kill all the other monsters.

After Jake drops her off near her home, Lana returns to find Logan waiting for her. He apologizes for his behavior at the hospital, and she forgives him. They have passionate sex, during which Lana reveals a partial truth about the cause of her scars and her inability to have children. Afterward, while Lana listens through the bathroom door, Logan receives a call that Kenneth Ferguson’s body has been found and that the police want to question Hadley. Protective of his colleague, Logan states he is glad Ferguson is dead. He asks Lana to accompany him to FBI headquarters, as he must deal with the situation but plans to return quickly.

At FBI headquarters, Logan learns from Detective Duke that Ferguson was a serial child abuser who had dozens of victims. One of them, a girl named Laurel, has been brought in by a woman named Lindy May. Craig, a senior agent, reveals to Logan that Lindy is from Delaney Grove, which confirms a link between the town and the vigilante killer they have been hunting. They conclude the killer is not a sadist but is on a methodical revenge mission. Lindy provides a map to a burial ground where Ferguson buried his victims, information she leverages to secure custody of Laurel. Logan infers that the killer orchestrated this outcome and, noticing Hadley’s photo is absent from the collection, deduces that the killer spared her that indignity.

While waiting for Logan in the breakroom, Lana sees Lindy and Laurel and exchanges a secret, reassuring signal with them. Hadley observes the interaction with suspicion. Logan soon returns to tell Lana he has to stay at work and gives her his car keys. As Lana drives home, Jake calls with an update: The Boogeyman has released his hostage, Erica Norris, who is now demanding to speak only with Logan. Arriving at her house, Lana hears music playing inside. She enters and is immediately attacked by a man hiding in the dark. As he strangles her, he identifies himself as the Boogeyman and asks if she is afraid of him.