If you're familiar with the movie, you know the basic story. Unhappily married couple -- Rory and Julia -- moves into an inherited house and soon discovers that the husband's ne'er-do-well brother Frank is still in residence, sort of. He discovered a puzzle box, which opened a door that allowed a group of creatures known as the Cenobites to take him away for brutal torture. Now he needs Julia to help him restore himself and escape.
The movie and novella follow each other pretty much blow-by-blow. There are a few deviations in the movie, but in broad strokes it's the same. For the most part, it's one of those rare tales where I believe that I prefer the movie. I think I like the ending of the novella better, but the Cenobites, really, were made for the visual.