As Montresor and Fortunato reach the catacombs, Fortunato notices a tall hole in the wall and no amontillado. He decides to investigate the hole and finds one side as a chain, while the other has padlock. When Fortunato steps into the whole Montresor chains him up, and starts locking him in with blocks.
While Montresor is inserting the last few blocks, he has second thoughts. Fortunato tells Montresor it is a funny joke and to get him out of there and stop. Montresor refuses continuing his revenge.
As Montresor fills in the last few blocks, all he can hear is Fortunato's hat bells jingle. He throws the dim flambeau down so Fortunato can see the last bit of day before he puts the last block in. Montresor then goes on to tell us that no one has been back down in the catacombs for 50 years.