Norman Hopper [John Saxon] finds himself haunted by a Vietnam-era nightmare in which a U.S. POW, Charlie Bukowski [Giovanni Lombardo Radice], wounds him with a bite that carries a strange virus. The bite isn’t just physical; it carries a craving for human flesh that will later seep into Norman’s world with shocking consequences. He wakes unsettled, only to receive an unexpected call from Bukowski inviting him out for a drink. The timing couldn’t be worse: a young neighbor girl is trying to seduce him, and Norman, torn between old loyalties and present danger, declines. Yet the tension of the moment funnels into a fateful decision when Mary [Cinzia De Carolis]—a figure who embodies temptation—begins to press closer. In a moment of compulsion, Norman bites her, a choice that will ripple through his life and infect those around him.
Mary later reveals a troubling sort of thrill in the bite, and Norman’s fear clashes with a desire he hadn’t anticipated. He urges Bukowski to surrender to the police, hoping to contain the situation, but Bukowski’s fate spirals as he and fellow veteran Tom Thompson [Tony King] clash with guards, leading Bukowski to bite a police constable. The violence is not contained to one place; Norman signals to his wife, Jane Hopper [Elizabeth Turner], to stay inside the house while he confronts the consequences of the day’s chaos. He confesses to his wife the truth of what has happened and his unsettling wish to bite another person, a confession that shifts the couple’s dynamic from routine to perilous.
As the night deepens, Bukowski and Tom push forward in their struggle with authorities, and the bite victims begin to spread the infection. Bukowski sinks his teeth into a nurse named Helen; the virus asserts itself through raw aggression and a predatory instinct. Dr. Phil Mendez [Ramiro Oliveros] becomes a voice in the background, calling Jane to warn her that Norman’s symptoms may be more than a simple illness and arranging a hospital visit while he monitors the situation and takes a blood sample. The mall shootout’s coroner’s report lands on the scene, filled with warnings of cannibalistic behavior, signaling to everyone that the outbreak is both biological and chillingly unpredictable.
Jane’s encounter with Dr. Mendez grows more complex as the doctor attempts to push his own agenda, even as he explains the virus’s nature: a biological mutation driven by psychic alteration. He’s not merely a healer; he’s an investigator into mutated human behavior, and his motives begin to feel suspect as Norman moves toward hospital confinement. Norman agrees to undergo examination, and the hospital visit becomes a tense crossfire of suspicion and concern. A doctor collects a blood sample, while the world outside reckons with the ripple effect caused by the bite’s spread.
Inside the hospital, the situation deteriorates. The bitten constable retaliates against a fellow officer and is then shot by Captain McCoy [Wallace Wilkinson], a stark reminder that law enforcement is racing to contain a threat that seems almost metaphysical in its spread. Norman stumbles upon his fellow veterans, Charlie and Tom, who are sedated and kept on watch. A flashback to the moment of the initial bite resurfaces, offering Norman a painful reminder of the turning point that drew him into this new nightmare. The hospital’s inner rhythm shifts as Helen, the nurse, becomes a target of the virus’s ferocity. She attacks the doctor inspecting Norman’s blood, bites off his tongue, and bludgeons him with a rock, turning the once-sterile hospital into a scene of primal struggle. The bitten nurse’s aggression spreads chaos, and Helen frees Tom and Charlie, triggering a chain of escape that will push Norman toward a desperate exit.
Norman and Charlie escape in an ambulance, while Jane returns to an empty house, searching for Norman in a space that feels increasingly unfamiliar. Dr. Mendez informs her that Norman has vanished, and a city-wide manhunt begins. The chase leads the two escapees to a tire shop where they seize a weapon and a bag of snacks, an inventory of ordinary objects becoming tools of survival in a world that has turned brutal. Charlie wields an angle grinder, cutting through a victim as a stark reminder that the line between restraint and violence has vanished. Tom steals a station wagon, and the trio of escapees—Norman, Charlie, and Tom—drift into a network of pursuit that is both physical and psychological.
The fugitives cross paths with a biker gang, a clash Norman had glimpsed earlier at the mall. They flee on foot and take shelter in the sewer as police close in, creating a claustrophobic corridor of danger where the city’s light can barely reach. A police blockade seals the sewer exits, trapping the trio in a subterranean labyrinth. Jane, unable to reach Norman by telephone, goes next door to Mary’s aunt to borrow a line, but the household remains shrouded in uncertainty. Mary [Cinzia De Carolis] and her brother greet Jane, offering a momentary safety but also a reminder that the children who inhabit this world are watching, listening, and becoming part of the horror. The aunt’s absence deepens the sense that danger lurks in every corner.
As the chase intensifies, Helen is killed by a rat just as the cannibals attempt to slip away, signifying that nature itself has become a weapon in this new order. A hail of gunfire claims Charlie’s life, and Norman is wounded, while Tom is overwhelmed and killed by a flamethrower, an image of destruction that underscores the film’s relentless brutality. Norman crawls from the sewer’s grip and staggers away, a man not yet defeated but forever altered by the chain of events.
Jane’s search for Norman reaches a dramatic notch as she presents at home with Norman in a dress uniform—an eerie tableau of a man transformed by war and disease. Dr. Mendez steps into the room, and Jane rushes toward him, only for him to bite her, a final, brutal betrayal that seals Norman’s fate. Norman fires at the intruder, and Jane, seized by fear and despair, points a gun at her own head as the sounds of police finally erupt outside the house. The moment is loaded with tragedy, and as the authorities arrive, the world outside the walls begins to understand the full extent of the infection’s reach.
The story closes on a macabre tableau: the infected children watch as bodies are hauled away, the girl Mary asks whether their aunt will be found, and a chilling image reveals Mary’s hand encroaching from inside the fridge. The film closes on this unsettling note, leaving questions about loyalty, disease, and the fragility of ordinary life in a world where a bite can rewrite fate.
In this account, the film threads together a relentless cascade of fear and transformation, balancing intimate character moments with a broader dread that something unseen has taken root inside a family, a hospital, and a city. The cast’s varied performances ground the escalating terror, with Norman Hopper’s struggle at the center, supported by Bukowski’s older combat history, Mendez’s unsettling dual role as healer and conspirator, Jane’s determined search for truth, Helen’s tragic fall, and Tom and Charlie’s desperate attempts to escape a world that has turned cannibal. The result is a bleak, unflinching meditation on what happens when humanity’s boundaries blur and a virus becomes something more than biology.
