A young woman responds to a job advertisement for a housekeeping position in a strange and isolated high rise building in New York City. Hoping for a fresh start and a stable job, she moves into the building without realizing that many people connected to the place have mysteriously disappeared over the years. As she spends more time there, she begins to notice disturbing events, secretive residents, and an atmosphere filled with fear and mystery. Slowly, she uncovers terrifying secrets that suggest the building may be controlled by a dark Satanic cult hiding behind its quiet appearance.