In
Homewood, Alabama, Simon McNally, a man with
paranoid schizophrenia, experiences vivid hallucinations and is tormented by the disembodied voice of his abusive, deceased father, who continually degrades and belittles him. Recently released from a mental hospital after nearly a decade, Simon struggles to function in daily life, leaving his older sister, DeeDee, to shoulder the financial burden of supporting them both. One day, Simon witnesses a young woman being assaulted and forced into a van by a man whose face appears blurred to him. His father's voice insists he is hallucinating and too weak to help, but Simon becomes fixated on rescuing her. He reports the incident to local police detective Liz Glover, who checks the van's license plate and finds it registered to a car located hundreds of miles away. Recognizing Simon from previous violent episodes linked to his illness, she dismisses his claim as a delusion. Desperate, Simon turns to his neighbor Ed Deerman, a reluctantly retired campus security guard. Though skeptical of Simon's story, Ed agrees to help, suspecting Simon may have misread the license plate. At the
Department of Motor Vehicles, Ed tries to persuade staff to disclose plate records, but Simon becomes overwhelmed and has a violent outburst when they refuse. They retreat to Ed's car, where he unintentionally calms Simon by repeatedly clicking his pen. Based on Simon's description of the woman's outfit, Ed questions local sex workers, but the encounter ends with his car being smashed by their pimp. Frustrated, Ed admits he never believed Simon's story. Simon leaves to continue the search alone, but Ed ultimately takes pity on him and rejoins the effort. Ed blackmails his replacement at campus security into obtaining plate records from a traffic officer friend. They visit several addresses until tracing the vehicle to Kurt's Auto Salvage, where they find the car with its plates removed, confirming the van was using stolen tags. Suddenly, Simon hears a scream and rushes toward a nearby car, believing the woman is inside. Ed stops him, insisting there was no scream. That night, Simon argues with DeeDee, expressing resentment over her leaving him alone with their father. Meanwhile, Ed is attacked at home by the abductor. Simon witnesses the assault and rushes to intervene. Together they disarm the man, and Simon accidentally shoots him dead. They take the man's phone, which contains only two contacts, one belonging to Kurt, and go to DeeDee's workplace so she can treat Ed's wounds. Officers soon arrive, searching for them following the shooting, but Simon and Ed escape by bus. The next day, the pair confront Kurt. Simon notices that a wall clock conceals a safe, just like Ed's at home, inside which they find several women's passports, including one belonging to Anya, the missing woman. Kurt confesses that the abductor was a sex trafficker and that Anya was being punished for attempting to escape. After Kurt provides the abductor's address, they call the police on him, leaving the passports behind for Glover to find. At the address, Simon suffers another breakdown as a hallucination of his father taunts him that he will fail. Ed comforts and calms him using the clicking pen, then gives it to Simon to keep. They break into the house and find it seemingly empty—until the abductor's mother appears and flees. Realizing there must be a hidden room, they discover a concealed door and find Anya inside. Police arrive, take Anya to safety, and arrest Ed and Simon, whom Glover quietly congratulates. Simon and Ed exchange a smile while maintaining eye contact, something Simon had previously been unable to do. ==Cast==