The plot is based on the concept of revenge for some insult (never revealed) to the narrator, Montresor. Fortunado had the grave mistake of somehow insulting Montresor. Montresor plotted his revenge against the unknowing victim for quite some time. He used Fortunado's pride in the knowledge of wines to lure him to his gruesome death, walled up alive in the catacombs of the Montresors. The ironies that appear in the trip to the keg of wine warn the reader of Montresor's warped mind. His false concern for the victim and his use of words with more than one meaning have no effect on the drunken Fortunado however. His disappearance will remain a mystery to all of the townspeople, except for Montresor.