"...the old man sprang up in bed, crying out --"Who's there?"
"In an instant I dragged him to the floor, and pulled the heavy bed over him. I then smiled gaily..."
"I then took up three planks from the flooring of the chamber, and deposited all between the scantlings. I then replaced the boards so cleverly, so cunningly..."
The narrator slowly tries to open the door to the old man's bedroom, but abruptly wakes him up in the process.
"No doubt I now grew very pale; --but I talked more fluently, and with a heightened voice. Yet the sound increased --and what could I do? It was a low, dull, quick sound..."
After waiting for his chance, the narrator drags the old man out of his bed and throws the bed over him.
"Villains!" I shrieked, "dissemble no more! I admit the deed! --tear up the planks! here, here! --It is the beating of his hideous heart!"
The narrator dismembers the old man and buries him below the floorboards.
Three police arrive to the narrator's house, and although calm at first, the narrator hears a faint beating of the old man's heart that eventually becomes louder and louder, driving the narrator insane.
After having enough of it, the narrator confesses to the murder and tells the officers to tear up the floorboards.