At the beginning of the story, Montresor is a bitter man who wants revenge against an associate named Fortunato.
Montresor met Fortunato at a carnival and wanted to lead him back to his vaults while people were busy with the carnival.
Montresor tells the already very drunk Fortunato that he has Amontillado in his vaults and he wants Fortunato to check the wine, but constantly threatens to have Luchesi check the wine, which makes Fortunato upset.
Montresor chains Fortunato to the wall and begins to seal him in behind a wall.
Montresor Forces the last stone of brick wall into place, trapping Fortunato with no way out.