Dr. Mortimer tells Sherlock and Mr. Watson about the history of the curse of the Baskervilles. It imports, that Hugo Baskerville (the former owner of the house, the Baskerville Hall) kidnapped a daughter of a farmer. It was at night, as Hugo and his guests were drunk and she wanted to flee home but Hugo Baskerville agitated the hellhound on her. As Hugo arrived at the moor, he found the girl dead on the floor, next to her the hellhound. After a little moment, the hound catched Hugo and killed him to. And since then, a curse was over the people, who stayed at the Hall of Baskerville. And now it`s one of many mords by the inhabitants of the Baskerville Hall. A few days ago there is an other misteryous mord of Sir Charles. Now, the two detectives take the mord under the loupe.