The setting is at the Old's man's house specifically in the middle of the night. Our narrator is our antagonist. The narrator wants to kill the old man because of his "vulture eye" and throughout the story narrator tries to prove his sanity.
the narrator tries to prove his sanity by being nice to the old man for a whole week. the narrator would look in on the old man. the narrator would turn his lantern on to see if the old man's eye was open. the narrator would ask the old man how he slept. the narrator would ask the old man that question to see if he was getting suspicious of him being in the room.
on the 8th night the narrator wakes the old man and continues to go into the old man's room. For one hour the narrator and the old man have a standoff while the old man is siting in his bed awake. the narrator is opening the lantern very carefully so he doesn't wake the old man with the sound of the lantern and he sees the old man's eye is open. The narrator hears a low dull quick sound and starts to think it's the old man's heart.
On the eight night the narrator decides to kill the old man. The narrator kills the old man by suffocating him with his own mattress.
The narrator dismembers the old man in the bathtub so their is no blood stains. The narrator then hides the old man under the floorboards. The police arrive because the neighbors heard screams coming from the old man's room. The police search and the narrator invites them in to sit. The narrator sits on a chair that's on top of the old man's body.
The narrator confesses that he is the murderer because he can't stand the sound of the old man's heartbeat which is his own guilt. The narrator gets arrested by the police because he confessed.