Ghostbusters (1984)

In this thrilling action-comedy, four parapsychologists lose a research grant when their experiment methodology is proven to be bogus. The team decides to go into business for themselves and open Ghostbusters, a ghost removal service. After struggling to get on their feet, they are summoned to investigate the strange happenings in a woman's Central Park West apartment. What they discover is that all Manhattan is being besieged by ghosts and other worldly demons through a portal in her building.