Kristy

An ominous hooded figure photographs a young woman's corpse in a desolate field. Quick cuts show internet screenshots and video clips of ritual murders, which land on an anonymous underground website urging viewers to 'kill Kristy'.

Justine is a financially strapped college student living on a private Northeastern campus during Thanksgiving break. The campus feels watchful and isolating as security guards and staff drift through the night.

At a nearby convenience store, Violet compliments Justine's car and then insults her. Inside, Justine's laptop is breached and a snuff film plays; the invasion makes her realize the threat is both online and in the real world.

A masked assailant murders Wayne outside the campus while Justine watches. She also discovers Dave dead in his vehicle, heightening the sense that danger is closing in from every direction.

Violet reappears, records Justine, and declares they will hunt her, urging Justine to 'run to God.' The cult's reach feels intimate as the terror expands from screens to the streets.

Justine seeks help at Scott's house, hoping for sanctuary. The cult breaks in, kills Scott’s dog, and hangs Scott from a swing set, turning a refuge into a nightmare.

Justine tries to call 9-1-1 from Scott's phone, but the line has been hacked by the cult. They flood her world with more video clips and threatening messages, forcing her into hiding.

Justine climbs to a roof to escape and is cornered, but she makes a desperate leap to survive. Aaron arrives to help but is killed, leaving Justine to act alone.

She uses Aaron's car to pin a cult member against a wall, then flees to a gym, where the night tightens around her.

In the gym's swimming pool area, Justine slits a cult member's throat with car keys and sinks a second by drowning him. The pool becomes a brutal stage for her survival as she fights back.

A brutal chase culminates as Justine beats another attacker to death with a baseball bat. Her improvisation and rage drive every strike.

Justine finds a text on the dead man's phone asking if they've killed Kristy yet and sees photos of other victims. The revelation clarifies the cult's mission and sets the stakes for what comes next.

Using pool chemicals, Justine creates a flammable powder, dons the dead man's mask and jacket, and approaches Violet's car. She ignites the powder, burns Violet alive, photographs the corpse, and uploads the image.

A final montage shows similar murders across other states and cities, suggesting a sprawling network. Justine's testimony and the recovered phone begin to bring the cult down, with arrests following.

The post-credits scene shows a young woman attacked by a cult killer outside her home, only to be stopped by a masked defender whose identity remains unknown. The moment hints at a continuing cycle of violence and the possibility of new guardians.