In the sleepy town of Devil’s Kettle, Minnesota, the lives of high school best friends Jennifer Check and Needy Lesnicki are irrevocably altered after a local indie band, Low Shoulder, performs at a dive bar. Desperate for fame, the band abducts Jennifer, intending to offer her as a
virgin sacrifice to Satan. However, because Jennifer is not actually a virgin, the ritual goes horribly wrong, transforming her into a demonic, flesh-eating succubus. She returns to town possessing an insatiable hunger for the male population, leaving a trail of gruesome, supernatural murders in her wake.As Jennifer grows increasingly predatory and manipulative, Needy begins to suspect that her friend is behind the string of horrific deaths. Their codependent relationship reaches a breaking point when Jennifer targets Chip, Needy’s boyfriend. Needy eventually discovers the truth about Jennifer’s demonic condition and realizes that her friend has become a monster who feeds on human suffering to maintain her youthful, otherworldly beauty. The dynamic shifts from one of lifelong sisterhood to a deadly game of survival as Needy confronts the reality that Jennifer no longer possesses a soul.The escalating tension culminates in a violent, climactic confrontation. Realizing that the town will never be safe while Jennifer lives, Needy decides she must kill her best friend. After a harrowing battle, Needy manages to slay Jennifer, ending her reign of terror. However, the emotional toll is profound; Needy is institutionalized for the trauma and the social stigma of being associated with the murders. While incarcerated, Needy discovers that she has inherited some of Jennifer's supernatural abilities, including her heightened strength and predatory instincts.The story concludes with Needy escaping the facility, fueled by a newfound sense of empowerment and vengeance. She tracks down the members of Low Shoulder—the band responsible for the ritual that ruined her life—and enacts a brutal, calculated retribution. By embracing the darkness that Jennifer left behind, Needy transitions from a timid observer to a formidable force of nature, finally reclaiming her agency while becoming the very thing she once feared. The film serves as a dark, satirical exploration of
female friendship, the toxicity of teenage social hierarchies, and the violent consequences of objectification.