The lowdown:
The Mayorial election for New York City is coming up and a party that hasn't won in a century (or thereabouts) wants a trendy competitor for the Incumbent Hizonnor, one Arnie Lapinksi, who also happens to be on fairly positive terms with the Ghostbusters. As it happens, this party wants Peter Venkman to run against him.
At the same time, a series of strange hauntings (aren't they always? ) begin to plague the city, bringing to unlife urban legends of all shapes, sizes and grotesquery… and as the race for mayor heats up, so does the haunting, and so the Ghostbusters have got to combat this latest paranormal threat with at least one man absent as he campaigns for the most powerful seat in the city.