When Fortunato and Montresor arrive to the catacombs, Montresor tells Fortunato that the wine is in the dark room. When Fortunato steps into the dark room, Montresor chains him to the wall and begins to close in the wall with bricks.
When Montresor is piling the bricks, Fortunato starts waking up. Fortunato believes that Montresor is playing a prank on him when he he is really getting revenge. When Fortunato begins to realize its not a prank, he begins begging Montresor to let him go.
Before Montresor places down the last brick, he throws in a torch for Fortunato to give him some light. Montresor heard nothing from the tomb besides the jingle from Fortunato's hat as he sat down. He then put on the last brick to close up the tomb. Montresor tells us that the tomb hasn't been touched in 50 years.