The story begin after Dr Mortimer went to find Mr Holmes because something had happen that needed help and advice from Mr Holmes. Dr. Mortimer told Mr Holmes that he had received a letter from Sir Charles about the story of Baskerville family.
Inside the letter were a story about a god that will punish those who do evil and also forgive those who has regretted their mistakes.
In 1640, the head of the Baskerville family was Sir Hugo Baskerville. He caught a beautiful girl and went back to Baskerville Hall and locked her in a room. The girl was very afraid, so she started escape and wants to go back home. Sir Hugo want to catch the girl after he realized that the girl has escaped.