This is my cat, Pluto. I love him very very much!
Later that night..
I'm drunk. You know what? I'm gonna stab your eye out, and then hang you!
A short time after Pluto dies, the narrator goes to the bar and finds a cat that looks just like him. He decides to take the cat home.
The narrator's wife calls him down to the basement. After tripping over the cat, the narrator decides to stab it, out of sheer anger. His wife tries to stop him, resulting in her being killed instead. The narrator hides the body behind the wall.
The police show up to investigate the disappearance of the narrator's wife. The narrator breaks the wall down, and shows the police his crime. However, there sat the cat, angry and vengeful.