Montressor has a plan to kill Fortunado because he has insulted him and his family. He finds him at the carnival already drunk so, half of Montressor's plan is done.
Montressor lures Fortunado by saying he has a rare wine called Amontillado in his catacombs. Fortunado really wants to go drink more but, Montressor repeatedly says that its okay he'll get someone else to examine it. Fortunado get mad and goes with Montressor.
They reach the catacombs, and Montressor keeps giving him more drinks to keep him drunk.
Montressor keeps repeating if they should turn back and get Luchresi instead. Fortunato get furious and insisted to continue. His plan is working.
Montressor chains Fortunato to the wall and begins to close it. He stops working to hear him struggle, it satisfies him
Once Montressor closes the wall completely he says," rest in piece."