The 4th Floor

A newly independent renter who inherits a rent-controlled brownstone and confronts the fragility of her new autonomy. Her move-in sparks a chain of disturbing incidents that test her courage, resilience, and ability to trust others, especially as she navigates pressure from her boyfriend and mounting evidence of a hidden threat.

Jane's boyfriend who urges her to move in and conflicts with her insistence on independence. He represents stability and support on one hand but also pressure on her personal autonomy, creating friction that amplifies the film’s tension.

Jane's neighbor from the first floor who offers gossip and context about the building’s occupants. She acts as a bridge between Jane and the building’s social web, though her information sometimes complicates the mystery.

The elderly-appearing occupant of the 4th floor who is revealed to be the terrorizing neighbor. His calm exterior masks a calculating and dangerous personality, driving much of the film’s confrontation with Jane.

A mysterious repairman who appears to help Jane but becomes entangled in the mounting danger as events escalate toward a violent confrontation. He provides a counterbalance to the fear by offering aid and a different perspective on what is happening.

The technician called to deal with the maggot and rodent infestation, whose findings hint at deliberate manipulation of Jane’s living space.

Jane's coworker friend who appears briefly and represents external life beyond the apartment, offering support when she can. She connects Jane to outside help and awareness of the situation.

The local Korean grocer who mentions Alice’s sudden discontinuation of daily orders, hinting at the larger mystery brewing in the building.

The hermit living on or beneath the 4th floor whose disappearance and presumed death become a central mystery piece in Jane’s investigation.