PKE readings jump in New York when some ancient ruins from seventh century Ireland arrive. The time when Halloween started. The evil spirit of Halloween, Samhaine, breaks free and wants to make Halloween last forever. It's up to the Ghostbusters to stop him.
Peter is in another room.
Peter Venkman: Hey Winston, what's small and hairy and green all over?
Winston Zeddemore:This is no time for jokin Peter.
Peter Venkman: Who's jokin?
A small hairy green monster follows Peter out of the other room.
Egon and Ray are working on a machine that short-circuits and falls apart.
Winston Zeddemore:Uh, not to pry, but what exactly is that thing you two've been workin on?
Egon Spengler: A spectren diffarentalizer!
Ray Stantz: A toaster.
Ray and Egon look at the instructions in their hands.
Ray and Egon:Huh?
Egon Spengler: I think we should have a nice long talk!