It starts off with a man. He had killed someone and the body is under the floorboards. Every day hes getting more and more frantic thinking someone will come after him or find out he did it. On the eighth night he then had police come and investigate. The man started hearing a rhythmic beat. It continued and the man released it was a heart beat. Slowly but surly he started going mad from hearing it and thinking the police could hear it he told them he had killed the man and where he was hiding. They took up three floorboards and found the corpse and the killer was brought to jail.