Montresor vows to get revenge on Fortunato and so Montresor walks up to Fortunato and starts a conversation with him about Amontillado (wine).
Montresor leads Fortunato to the catacombs of the Montresor's. Fortunato is drinking to much wine and his health declines. But refuses to go back. So they continue through the catacombs While Fortunato is still unware that he's being lead to his death.
As they get deeper into the catacombs Montresor continues to give Fortunato glasses of wine. Fortunato becoming more drunk with every glass.
They arrive at a spot where there is a caved-in area between two walls. Montresor sees this as an opportunity to find a way to get his revenge on Fortunato. Montresor places Fortunato to rest between the two walls.
Montresor finds building stone and mortar underneath some bones on the ground. He vigorously began to wall up the entrance. Montresor had finished the first row when he noticed Fortunato's intoxication had almost completely wore off. Montresor began to build the wall faster, starting to hesitate when he was almost done.
Montresor finished the wall except for one stone to be put down. Montresor called for Fortunato but he did not respond. And nobody has disturbed that grave for half of a century.