The 4th Floor synopsis
After her aunt dies, young New Yorker Jane (Juliette Lewis) inherits her dead relative's rent-controlled apartment. Her boyfriend, Greg (William Hurt), thinks there's something off about the building, but Jane dismisses his warnings and moves in. Things get strange, though, when tenants like Martha (Shelley Duvall) grow hostile with their new neighbor. Jane's paranoia mounts when she starts to receive anonymous threats and encounter deadly traps in the building.