What is a brief summary of "The Cask of Amontillado"?

' The narrator, Montresor, opens the story by stating that he has been irreparably insulted by his acquaintance, Fortunato, and that he seeks revenge. He tells Fortunato that he has acquired something that could pass for Amontillado, a light Spanish sherry. Fortunato is anxious to taste the wine and to determine for Montresor whether or not it is truly Amontillado. Fortunato insists that they go to Montresor's vaults.  On the exposed wall is a small recess, where Montresor tells Fortunato that the Amontillado is being stored. Fortunato, now heavily intoxicated, goes to the back of the recess. Montresor then suddenly chains the slow-footed Fortunato to a stone. Taunting Fortunato with an offer to leave, Montresor begins to wall up the entrance to this small crypt, thereby trapping Fortunato inside. Fortunato screams confusedly as Montresor builds the first layer of the wall. The alcohol soon wears off and Fortunato moans, terrified and helpless. As the layers continue to rise, though, Fortunato falls silent. He fits the last stone into place and plasters the wall closed, his actions accompanied only by the jingling of Fortunato's bells. He finally repositions the bones on the fourth wall. For fifty years, he writes, no one has disturbed them.