Dr. Helen Hudson Holly Hunter, a respected expert on serial killers, begins the sequence by delivering a guest lecture on criminal psychology at a local university. The moment she leaves the lecture hall, an escaped subject, Daryll Lee Cullum, corners her in the restroom, where he murders a police officer and brutally assaults her. A second officer manages to subdue Cullum, who is then sent back to prison. The trauma from the attack leaves Helen with a crippling agoraphobia, confining her to a sprawling apartment and pushing her to conduct almost every aspect of her life through a computer screen, with the steady support of her live-in assistant, Andy.
Homicide detective M.J. Monahan Sigourney Weaver and her partner, Ruben Goetz, are immediately drawn into the case as a string of similar murders sweeps through San Francisco. Reluctantly, Helen agrees to lend her expertise, recognizing that the killer is playing a dangerous game of mental chess with the authorities. As the killings continue, it becomes clear that the perpetrator draws inspiration from infamous figures—Albert DeSalvo, The Hillside Strangler, David Berkowitz, Jeffrey Dahmer, and Ted Bundy—tying the murders to a chilling pattern. The killer begins to reach out to Helen directly, even stalking her, which drives a painful rift between her and the outside world. Cullum, now more connected to the case than ever, claims to have insider knowledge about the killer and reveals where the next attack will occur, offering a dangerous bridge between survivor and hunter.
The investigation hits a brutal snag when another unrelated incident at the police station unfolds: a suspect gains access to a firearm, takes Ruben hostage, and forces a dramatic confrontation. M.J. shoots the suspect in the right shoulder, who then rises again and kills Ruben with his left hand, leaving M.J. with a heavy burden of guilt. Rather than bow out, she resolves to continue the pursuit alone, driven by the need to bring the killer to justice and to honor the memory of her fallen partner.
As the clues mount, Helen realizes that the copycat killer is following the exact sequence of killers she outlined in her university lecture—an eerie echo of the night she was attacked. The team surmises that the next target would be Jeffrey Dahmer’s method, but they remain unsure of the when and where. The investigation takes a darker turn when Andy is abducted by the killer during a night out at a club and is killed in a manner reminiscent of Dahmer. A club witness identifies the killer as Peter Foley, a man known to the police for his correspondence with Cullum. A failed attempt to capture Foley at his residence leads M.J. to Helen’s home, where she discovers that Foley has kidnapped Helen and left a chilling video asking M.J. to guess Helen’s location.
M.J. races back to the lecture hall restroom—the site of Cullum’s earlier assault—and uncovers a grim tableau: Helen is bound, hanged, and gagged in the same terrifying pose Cullum used. Foley shoots M.J. in the chest, though her protective vest saves her from lethal harm, and she slumps unconscious. Foley then turns his attention to Helen, preparing to kill her in another staged crime scene. In a tense moment, Helen attempts to sabotage Foley’s plan by attempting to hang herself, but Foley intervenes and cuts her down. The struggle drives them to the rooftop, where Helen’s agoraphobia spikes, leaving her momentarily overwhelmed and cornered.
In a pivotal moment of resolve, M.J. arrives and shoots Foley in the arm, buying Helen a split-second chance to survive. Foley brandsishs his gun toward M.J., but Helen, gathering every ounce of courage, shoots Foley repeatedly—first at his torso and then finally in the head—ending his murderous spree. The climactic confrontation affirms Helen’s survival and resilience, even as the trauma of the ordeal continues to echo in the minds of those who fought to stop the killer.
In the aftermath, Cullum writes to another serial killer, outlining how to kill Helen and revealing that he had been assisting Foley all along. The closing note leaves the door open for further menace, hinting at a chilling continuation beyond the events depicted, and underscoring the fragile line between victim and target in a game that feeds on fear and psychological precision.
