Montresor wanted to get revenge on Fortunado for insulting Montresor's family. Montresor had come across Fortunado during the carnival in Italy. Montresor had asked Fortunado if he could check the Amontillado that he had bought.
Montresor and Fortunado were heading the the Catacomb to test out the Amontillado. Fortunado was a little bit tipsy.
Montresor and Fortunado were heading to the Catacombs and Fortunado was getting really drunk.
Fortunado had been drinking on the way through the Catacomb. Fortunado has been coughing through the way.
Fortunado was realizing that Montresor was up to something. Montresor had been waiting for his revenge on Fortunado.
Fortunado had realized that it had been a trap for him and there was no Amantillado. Montresor