Three parapsychologists forced out of their university funding set up shop as a unique ghost removal service in New York City, attracting frightened yet skeptical customers.
I literally interpreted this as a horror flick when I was little. That scene where the evil spirit frightens the librarian made it so that I couldn't interpret anything funny about the movie. Fortunately, I watched the movie a few years later and thought that it was one of the funniest things that I'd ever seen.