The theme of "The Tell-Tale Heart," gothic fiction story by Edgar Allan Poe is don't commit a crime because your guilty conscience could drive you insane. The narrator started the story, saying how sane he is, as well as saying he's not mad. So when the police comes to his house, he soon began to flip out and soon tells the police how he killed the old man and how nicely he planned the murder. In the end, when you do a guilty acts will drive you insane.
The exposition is when the narrator first started describing the old man, and how he loved him so much.
The old man's eye would make the narrator's "blood run cold." This was a conflict with him and made him want to murder the poor old man.
The narrator would sneak into the old man's room to watch him sleep
The climax is were the narrator kills the old man, cuts his body into pieces, and stuffs the parts under the floor.
The falling action is when the police came to investigate the narrator's house.
When the narrator finally attempted to the crime and showed the police men the body under the floor.