Three wacky scientists get kicked out of their university and decide to start a business catching ghosts. They team up with an un-assuming laborer and start to caputre ghosts in New York City. Along the way they meet a lady who has been having weird things happen in her apartment. Turns out that her apartment is the doorway to an alternate universe. The guys battle a ten story tall stay-puft marshmellow man and eventually save the day. Starting Bill Murry as Dr. Peter Venkman the wise cracking scientist, Dan Aykroyd as Dr. Raymond Stantz, the serious but stupid scientist, and Sigourney Weaver as Dana Barrett, the gorgeous woman in distress.