At the beginning of the story, Poe introduces the setting of a carnival. Most people consider a carnival to be light and cheery, but Poe represents it as dark and dreary. He dampens the tone and creates an atmosphere of suspense, “It was about dusk, one evening during the supreme madness of the carnival season.” Instead of creating a light atmosphere during the day, Poe creates a darker setting which is his purpose.
Poe uses foreshadowing quite often throughout the story to help create an atmosphere of suspense. At the very beginning of the story, we learn about something that Fortunato did and how Montresor wants to get revenge..."at length I would be avenged” and goes on to say that he will not only “punish, but punish with impunity." Poe uses foreshadowing here to keep the reader enticed as to how he will seek revenge.