Thsi is the first treehouse of horror and the only one told in the treehouse. The first story was dreamhouse The Simpsons buy a mansion cheap but find out it is haunted the house destroys itself itstead of living with them. It was a pretty good one.
The 2nd is a twilight zone parody where the simpsons is abducted by aliens who want to serve them but Lisa ends up ruining it and they are returned to earth. It is ok.
The third is The Raven the most memorable story in all of the treehouses of horrors. It is a retelling of Poe's Raven.
This one is the best of the three.