From Logan’s perspective, he and his partner, Donny, interview Diana Barnes, who provides the traumatic history of the Evans family. She describes Robert Evans, the school janitor, as a kind and loving father who was framed for a series of murders by the local sheriff and the corrupt agent Johnson, now SSA Johnson. The sheriff, whose daughter was one of the original victims, was emotionally compromised and sought a scapegoat.

Diana reveals that Robert was murdered in his cell; he didn’t die by suicide as was reported. Shortly after, Robert’s children, Victoria and Marcus, were lured into a trap by Victoria’s ex-boyfriend, Kyle Davenport—the sheriff’s son. Kyle and 12 other boys brutally tortured and gang-raped both teenagers. During the assault, Marcus was castrated for refusing to rape his own sister. Diana explains that she and another witness, Lindy May Wheeler, were silenced by threats. After the interview, Logan and Donny discover a new message from the killer—a Voltaire quote on the town hall roof—as a nursery rhyme sung by Victoria’s mother, Jasmine Evans, begins playing over the town’s speaker system.

From her hidden headquarters, Lana watches Logan on surveillance monitors as he processes Diana’s story. Her partner, Jake, is broadcasting the music to psychologically torment the town. They listen in as Sheriff Cannon and SSA Johnson argue; Johnson admits he helped cover up Robert Evans’s murder to protect his career. The sheriff then orders a deputy, Chad Briggs, to silence Diana Barnes.

Logan calls Lana, expressing concern for her safety, but she brushes it off. As Jake leaves to paint another message on the school building, Lana decides she must go to Diana’s house to protect her from the sheriff’s men. Lana arrives at Diana’s house and reveals her true identity as Victoria Evans by showing Diana the scars from the assault 10 years prior. The shock causes Diana to faint.

Logan, with Donny, interviews Christopher Denver, who is Jake’s father and was Robert Evans’s lawyer. Denver disputes the official file’s claim that the trial was not filmed—he has his own copy of the DVD and provides it to Logan. He explains that his son, Jake, was in love with Marcus and was devastated by the murders. Denver also reveals that before Victoria died, she told Jacob that “Marcus wanted to paint the world with theirs” (372)—the blood of their attackers—linking Marcus’s wish to the killer’s red paint signature. He directs the agents to Carl Burrows, a former coroner’s office employee.

Lana waits with Diana, who has regained consciousness. While monitoring their surveillance feeds, they overhear deputies Justin Hollis and Chad Briggs discussing their orders. Instead of targeting Diana, they decide to assassinate Logan, whom they see as the leader of the FBI team. Realizing Logan is in imminent danger, Lana races from the house to intercept them.

Logan and Donny are ambushed at a basketball court near their cabins by Deputy Justin Hollis. Hollis knocks Donny unconscious and hits Logan on the head, disorienting him. Just as Hollis prepares to execute Logan with Logan’s own gun, a small, black-clad figure attacks with brutal speed and precision, stabbing Hollis to death with a knife. Through his blurred vision, Logan perceives the killer is a woman and hears what sounds like feminine laughter. Soon after, Lana appears, pretending to have just found him, and calls for help.

In the emergency room, Logan’s team confirms that the Scarlet Slayer saved him and Donny. The killer left a message in Hollis’s blood, threatening to burn the town down if Logan is harmed again. Logan is deeply unsettled that a serial killer rescued him. He insists Lana go home for her safety, but she refuses. The team decides to increase security, and Agent Stan Leonard volunteers to stay in the same cabin as Logan and Lana.

The next morning, Leonard questions Lana about her past. After Logan wakes, they make plans to interview Carl Burrows. Leonard informs him that Kyle Davenport plans to attend the town’s annual “Sin House” that night. After Leonard leaves, Logan and Lana have an intense sexual encounter. Later, Logan watches a DVD of the Founder’s Day play—provided by Christopher Denver—featuring Lana’s mother, Jasmine, singing the lullaby used by the killer. He then ejects it and puts in a DVD of Robert Evans’s trial. Unaware of Lana’s connection, he studies the film for clues while she watches him, hiding her emotions, and retreats to the bedroom when the trial footage appears.

Driving to see Carl Burrows, Logan and Leonard discuss the case. Leonard speculates that the killer is a woman who has trained herself to be a lethal fighter. They arrive at Burrows’s home, a forensics lab filled with decomposing matter. Burrows, a paranoid scientist, explains that a medium told him they were coming. The killer has also left a message on his wall demanding he tell Robert Evans’s story.

Burrows confesses that he witnessed Sheriff Cannon and his deputies torture Robert to death in his cell by forcing him to swallow nails and raping him with batons. SSA Johnson was aware of the murder and covered it up. Burrows adds that Kyle Davenport is left-handed, a characteristic of the original serial killer. He also reveals that Kyle broke Robert’s left hand by slamming it in a locker—and that two kills occurred that same week—meaning Robert could not have committed those murders, yet this was ignored.

Logan and Leonard confront Kyle Davenport at his home. Kyle is arrogant and sociopathic, confirming he is not the original, more methodical killer, who is psychopathic. When Kyle makes a veiled threat against Lana, Leonard unnerves him by revealing that Lana killed the Boogeyman. Later, Sheriff Cannon and Johnson arrive at the cabin demanding a search, claiming Logan was seen buying drugs. Lana thwarts the pretextual search by demanding the sheriff and his men submit to a search first, preventing any evidence from being planted. The confrontation escalates, with Johnson and the sheriff vowing to remove Logan from the case.

Lana and Jake stake out the “Sin House,” preparing to abduct Kyle. They discuss their mission and Lana’s relationship with Logan. Disguised as a costumed performer, Lana enters the Sin House and murders Deputy Trevor Byron with a knife, then saws open Chad Briggs in full view of the crowd, who believe the killings are part of the show. She knocks Kyle unconscious by throwing the saw at his head, then drenches the sheet covering Trevor’s body with lye to create chaos, and drags Kyle through a hidden escape route beneath the floor to Jake’s waiting car. Kyle’s bruised and battered girlfriend runs off.

Logan and his team investigate the gruesome crime scene. The sheriff is enraged, while Leonard points out that the victims were directly involved in the Evans case. Logan’s interview with Kyle’s girlfriend reveals she is relieved he is gone. Leonard observes that the townspeople are beginning to see the killer as a vigilante. After finding signs of a vehicle at the escape point, Logan and Leonard realize the killer has a partner. Lana texts Logan a false alibi about a break-in at her home; Logan is only worried for her safety.

Lana and Jake have Kyle captive in a mirrored torture chamber they built for him. As Jake voices his growing paranoia that they will be caught, Lana begins to torture Kyle. She reveals her identity as Victoria Evans and, with Jake’s help, systematically re-enacts the horrors Kyle inflicted on her and her brother. Overwhelmed by traumatic memories, Lana weeps with rage as she cuts off Kyle’s fingers and begins to skin him alive.

Logan is woken by Lana’s return. Shortly after, FBI agent Lisa enters and tries to provoke Lana, but Hadley intervenes. Later, at a town meeting organized by the sheriff, Kyle Davenport’s flayed, castrated body is revealed hanging from the church bell tower, his eyes sewn open. The town descends into panic. The team is horrified, but Leonard challenges Logan, asking if he would find the act so depraved if his own sister had been Kyle’s victim. Logan replies that he does not have a sister and walks away.

Lana releases her anger over Lisa’s provocations by throwing knives at her picture. She is unusually cold and detached after torturing Kyle, explaining to Hadley that her encounters with Logan are necessary “cooling down periods” that keep her sane (449). At the crime scene, a physical altercation breaks out between Logan and the sheriff. Lana instinctively strikes a deputy’s throat before he can hit her; Leonard then tackles and cuffs the man, while Donny handles another deputy. The conflict escalates until Lana, feeling her self-control slipping, leaves and calls Jake to help calm her down.

As the townspeople line up to give statements, no longer fearing the sheriff, Leonard reveals his findings to Logan. He discovered that Kennedy Carlyle—the daughter of the couple who killed Jasmine Evans—changed her name to Lana Myers. Ten years ago, she was in the same hospital as Victoria and Marcus, left with Jacob Denver, and is now his business partner. Leonard concludes that Lana is the killer, Jake is her partner, and Hadley has been protecting her. As a fiery message appears on the town hall, Logan, shattered by the betrayal, drives back to the cabin to confront Lana.

Logan returns to the cabin and has angry, punishing sex with Lana. Lana realizes partway through that he knows her identity, as he never returns her declarations of love. Afterward, he handcuffs her to the bed. He furiously accuses her of lying and using him, saying “I loved you” in the past tense, and refuses to hear any explanation. He calls her Kennedy Carlyle and storms out. Heartbroken, Lana picks the handcuff lock, gets dressed, and leaves. She goes to Jake’s new hideout and collapses, overwhelmed with grief, believing that Logan has made his choice, and their relationship is over.