Flashback (2021): The film opens three years earlier: a traveler named Claire checks into the Venus Motel and meets clerk Shelly Barnes. Claire hears the knock asking 'Is Tamara home?' and is abducted by Pin-Up Girl (Shelly), Scarecrow (Gregory), and Dollface (Jasmine), who murder her in their bunker.
The Rotter Conspiracy: Following Shelly’s death in Chapter 2, Maya takes shelter in the church. Gregory arrives unmasked to mourn Shelly. Maya flees and is detained by Sheriff Rotter. Suspecting the Sheriff, Maya steals his cruiser but crashes into the woods, where Gregory and Jasmine recapture her. Flashbacks reveal Sheriff Rotter is Gregory’s father, who protected him from prison after Gregory murdered classmate Tamara, on the condition that Gregory and Shelly only kill transient outsiders.
Indoctrination and Bloodshed: Gregory and Jasmine dispose of Shelly’s body in a sawmill woodchipper. Gregory holds Maya hostage, brands her with the smiley-face tattoo, and tries to force her into becoming the new 'Pin-Up Girl'. When Maya’s sister Debbie and brother-in-law Howard arrive searching for her, Gregory and Dollface brutally execute them before Maya's eyes.
Climax & Ending: Maya snaps, killing Dollface with a machete. Armed with a shotgun, Maya enters the bunker, executes Sheriff Rotter, and battles Gregory. When Gregory taunts 'We're the same now,' Maya stabs him in the heart with an axe, whispering 'Maybe'. Maya exits into the cold morning holding Scarecrow’s mask, transformed into the very avatar of terror that destroyed her life.