Based on the 1984 film of the same name, the Ghostbusters are the ones to call to "bust" any ghost hauntings. They do this through the use of nuclear-accelerated "proton packs" and "ghost traps", whereby the ghosts can be captured and transferred to a secure storage facility at their Headquarters. However New York City has suddenly become a very haunted place, and the number of ghosts has suddenly and dramatically increased. The Ghostbusters must reduce the paranormal psychokinetic energy, the "PK level" in the city, which represents ghost power, before the Temple of Zuul awakens and resurrects an evil goddess called Gozer.