In the grimy underbelly of New York City, a disturbed loner struggles with deep-seated psychological issues linked to his troubled past and his overbearing mother. The man, Frank Zito, is a serial killer who scours the city streets at night, preying on young women. His gruesome pattern of violence includes scalping his victims and taking their hair as trophies, which he attaches to mannequins in his decrepit apartment. These acts serve as a twisted attempt to preserve some semblance of companionship and control, compensating for his profound loneliness and the abuse he faced as a child.

As the body count rises, Frank's grip on reality wanes, with his hallucinations and flashbacks intensifying. His dangerous obsession with beauty and death draws him to a photographer named Anna, whom he encounters during a photo shoot in a park. Charmed by her talent and grace, he forges a connection with Anna, unaware that this new relationship might trigger an even deeper descent into his own madness. As Frank navigates the blurred lines between delusion and reality, the police inch closer to unmasking the serial killer that has been terrorizing the city.