On a late night at a carnival, Montresor runs into Fortunato and offers to share a bottle of Amontillado wine with him, however this "wine" is in the catacombs.
Montresor claims that Fortunato has greatly offended him to the point that Montresor wants revenge, it is never explained why Montresor has came to this point with Fortunato.
Montresor lures Fortunato down the dark and damp wine cellar where Montresor repeatedly has asked if Fortunato wishes to go back because he is seemingly ill, however Fortunato just continues to go further down the cellar and drink his wine.
They finally reach to where the supposed "Amontillado wine" is claimed to be but there is no wine just a hole in the wall where Fortunato is shackled to by Montresor. He then begins to cover up the hole with bricks.
Montresor lays the finals bricks and while doing so Fortunato screams for him to stop but it is too late
As Montresor walks away the sound of Fortunatos bells on his hat can be heard echoing in his tomb, For 50 years his tomb has not been disturbed.