What happened before the story in "The Cask of Amontillado?" or After What happened after the story in "The Cask of Amontillado?"
The man that was being bricked up in the wall (kinda foggy on names) effectively screwed over the man doing the bricking. The man doing the bricking wanted to get back at him so he chained him in the basement and built a wall around him. Supposably he was left there to die.