Final answer:
In 'The Cask of Amontillado' by Edgar Allan Poe, the narrator Montresor plans to exact revenge on Fortunato by leading him into the catacombs and entombing him alive behind a newly constructed wall.
Step-by-step explanation:
In Edgar Allan Poe's The Cask of Amontillado, the narrator, Montresor, describes a deeply spiteful plan to enact revenge on his acquaintance, Fortunato. The plan, which is the story's main arc, involves luring Fortunato into the catacombs under the pretense of tasting a rare vintage of wine called Amontillado.
Once there, under the guise of sharing a connoisseur's experience, Montresor chains Fortunato to a wall in a niche and methodically walls him in alive, brick by brick. Through this heinous act, Montresor seeks to punish Fortunato with impunity, ensuring that he suffers for the perceived wrongs he committed against Montresor. The horror of the act and Montresor's cold, calculated execution of his plan adds to the macabre mood of this chilling tale.