Peter Loew, portrayed by Nicolas Cage, is a literary agent driven by overwhelming ambition, relentlessly chasing after wealth and status. However, as he climbs the ladder of success, his mental health begins to deteriorate. His days are consumed by a tireless pursuit of accolades, while his nights are filled with the hedonistic pleasures of nightlife—where he finds momentary solace in the arms of various women and the intoxicating embrace of cocaine and alcohol. Despite attending regular therapy sessions, Peter's grasp on reality weakens, eliciting growing concern from his therapist over the bizarre and unnerving nature of his rants.
One fateful night, a bat unexpectedly swoops into his apartment, prompting panic and chaos as he seeks safety alongside a woman he had just brought home. Although initially rattled, Peter feels a strange rush of exhilaration that he eagerly shares with his therapist during their next meeting, claiming it has awakened something deep within him.
Yet, this brief flicker of excitement quickly fades, as Peter’s focus shifts upon meeting Rachel at a nightclub. The chemistry is electric as they leave together, but the night takes a darker twist when Rachel reveals her vampiric nature, sinking her fangs into Peter's neck. The following morning, despite appearing unscathed, Peter's belief in his own reality begins to unravel completely.
Days turn into nights, and Peter grows increasingly paranoid, convinced that he is metamorphosing into a vampire. His efforts to confirm this transformation through mirrors only fuel his delusions, leading him to wear dark sunglasses indoors and dress a non-existent wound on his neck. This fixation on Rachel's nightly visits heightens his anxiety, as he becomes consumed with the idea that she is draining his life force under the cover of darkness.
As Peter's erratic behavior escalates, it begins to impact his relationships, including with Jackie—who once reveled in the whirlwind of his lifestyle. When Peter reaches out to apologize and make amends, Rachel's sudden appearance at his doorstep casts a shadow over their already strained relationship. As Peter stumbles through the blurred lines of reality and fantasy, it becomes increasingly clear that his spiral into madness is just beginning.
In a chilling turn of events, Alva Restrepo finds herself caught in Peter's escalating sadism. Initially subjected to his endless demand for paperwork, she later endures a harrowing encounter at her home where he manipulates her to return to work. When she fails to produce the desired contract, Peter’s frustration boils into violence, leaving Alva shaken.
His descent into madness is further compounded by hallucinations of Rachel, who he believes is omnipresent. In a shocking moment of self-inflicted harm, he fires a blank gun into his mouth, feeling momentarily invulnerable. With a newfound obsession with vampiric aesthetics, Peter dons novelty fangs and attends a nightclub, imitating the ghastly movements of Orlok from "Nosferatu." His behavior deteriorates rapidly as he attempts, and fails, to seduce a woman, transforming his advances into aggression and resulting in a brutal assault.
The real Rachel makes an unexpected appearance at the nightclub, but her distant demeanor suggests she is consciously avoiding him. As Peter, now completely unhinged, tries to confront her, he is thwarted by her date, leading to security dragging him away from the escalating chaos.
Meanwhile, Alva, now disoriented and exposed, reflects on the possibility of her brutal assault. Her brother Emilio, fueled by rage, seeks revenge on Peter, while Alva grapples with the aftermath of the traumatic encounter. Peter, in a state of disarray, roams the streets, his business attire drenched in blood from previous violent incidents. He engages in a twisted monologue with his therapist, confessing to a slew of heinous acts, including rape and murder, as a newspaper headline ominously echoes the brutal reality of his actions.
Upon returning to the wreckage of his apartment, Alva identifies Peter to Emilio, who chases him down with a tire iron. Amidst a volatile confrontation with a figment of his imagination, Peter's mental state continues to disintegrate. Overcome with guilt and the blood he has consumed, he crawls beneath an overturned sofa, seeking solace like a coffin. Emilio confronts him, and in a fit of rage, plunges a makeshift stake into Peter, sealing his fate.
In his final moments, as life ebbs away, Peter is haunted by the spectral figure of Rachel, her gaze piercing into him as if beckoning him to join her in the shadows.
