In the cursed town of Shadyside, Ohio, high school student Deena Johnson is reeling from a recent breakup with her girlfriend, Sam Fraser, who moved to the neighboring, affluent town of Sunnyvale. The town’s history is defined by a series of brutal, rhythmic massacres attributed to a centuries-old witch named Sarah Fier. The
cycle of violence restarts when a masked killer slaughters employees at a local mall. During a chaotic confrontation, Sam accidentally disturbs the grave of Sarah Fier, inadvertently marking herself as the witch’s next target.Deena, her drug-dealing brother Josh, and their friends Kate and Simon discover that the witch is summoning past Shadyside serial killers to hunt Sam down. The group realizes that the killers are drawn to Sam because of the blood she spilled at the gravesite. As the undead slashers—including the Skull Mask killer and the Camp Nightwing murderer—begin to systematically stalk them through the school and beyond, the teenagers scramble to find a way to break the curse. Their desperation leads them to uncover a chilling truth: Shadyside is not just unlucky; it is a sacrificial ground where Sunnyvale’s prosperity is fueled by the blood of Shadyside’s residents.The friends formulate a dangerous plan to "kill" Sam using an overdose of pills, hoping that by temporarily ending her life, the witch’s tether will be severed, allowing them to resuscitate her afterward. The plan is fraught with terror as the killers close in, forcing the group to fight for their lives in the school’s hallways. Despite their bravery, the situation spirals into tragedy when Kate and Simon are brutally murdered, leaving Deena and Josh devastated.Ultimately, Deena succeeds in stopping Sam’s heart, causing the spectral killers to vanish instantly. She successfully resuscitates Sam, but their reprieve is short-lived. A
mysterious force possesses Sam, leading her to attack Deena before fleeing. As the dust settles, Josh receives an online message from a survivor of a 1978 massacre, indicating that the nightmare is far from over. The teenagers realize they have only scratched the surface of a dark, generational conspiracy that threatens to consume everyone they love, setting the stage for a deeper investigation into the town’s sinister, bloody origins.