You are introduced to the narrator that was a vagabond wandering to the old man house, the old man sleeping and the police questioning the narrator about a murder. The story takes place at night. The setting is in the old man's house.
The narrator finds the old man's eye creepy. The old man's heart made the narrator feel vex and felt he must get rid of it.
The narrator vigorously put effort into watching the old man every night until 12 for a week. Staring at the ugly eye the old man had.
The narrator can't stand the indignation of the old man's heart beating because it caused him so much anger. That the narrator decides to kill him. He suffocates the old man with the mattress.
The narrator aptly dismembered the old man's body put the body under the floor boards.
The narrator confesses to the police to killing the old man because he heard the old man's heart beating again and couldn't take the quilt anymore.
The narrator was showing dissimulation trying cover up his quilt.