The story is one of the Sherlock Holmes’s mystery. One day in London, one young man visited and appealed to him for help. His name is John McFarlane killed Jonas Oldacre in Oldacre’s house and burned him in the yard yesterday. But, McFarlane insisted on his innocence. He said that he went to Oldacre’s house in the morning the day before, and contacted with him to inherit him property if he died. And there were a finger print in the accident scene. So, the police were convinced he is murder. At the heels of that, Inspector Lestrade came in the house and arrested McFarlane. Holmes believed what McFarlane said and started to investigate at once. At first, he went to the accident scene. He observed the finger print carefully, and noticed it is imitation. It was made by using the thumb print on the contact. And, he discovered a secret door there. He entered the secret room and discovered a lot of furniture. He noticed that someone lives in the room. He solved the mystery completely. Holmes tried to burn the house to make sure of his idea, and Oldacre came from an inner room in haste. The case of murder was fake which was made by Oldacre. McFarlane blessed Holmes. Next day’s newspaper said that Inspector Lestrade solved the mystery. McFarlane got angry. But, Holmes said, ‘Never mind! The most important thing is to be proved your innocence!’