The narrator is introduced and is trying to convince the readers that he is not insane.
The narrator is mad about the old man's eye and how it resembled one of a vulture. He saw evil in this eye and wants to get rid of it forever.
For seven nights the man would go into the old man's bedroom every night at twelve and look in upon him as he slept.
I admit the deed!
On the eighth night the man accidentally woke up the old man. The old man's heart began to beat louder and louder, so loud that the man thought it would be heard by his neighbors. So he leaped into the room and attacked the old man.
After killing the old man, the man put the body beneath the floorboards of the old man's bedroom. But later that same night the man hears the old man's heart beating loudly from under the floorboards.
The man could not take the sound of the beating heart no more and confessed to the policemen that he indeed did do something to the old man.