The Ghostbusters franchise consists of American supernatural horror-comedies, based on an original concept created by Dan Aykroyd and Harold Ramis in 1984. The plot ostensibly centers around a group of eccentric New York City parapsychologists who investigate, encounter, and capture ghosts, paranormal manifestations, demigods and demons. The Ghostbusters use a specialized set of equipment in the 1984 film, and all subsequent Ghostbusters fiction includes similar equipment to aid in the capture and containment of ghosts.