Chapter 1. THE FRIGHTENED LADY
Helen Stoner needs help and visits Sherlok Holmens and his friend Dr. Watson. She is frightened because her twin sister died in a misterious way. She is worried for her own life.
Chapter 2. A MISTERIOUS DEATH
Helen is very terrified, because one day his sister, Julia, got engaged. The day after Julia hears strange noises. In the night Julia shauts and Helen goes for her room, opens the door and finds her brother died.
Chapter 3. HELEN'S FEARS
Helen's says to Sherlock that she thinks that the murderer of Julia was his step-father because is very violent.
His step father is doing repairs at hame and Helen sleeps in Julia's bedroom. Last night she hears a strange whitesling so she's got scared and he caugh the firs train to London.
Chapter 4. AN ANGRY VISITOR
Gimesby visits Holmes and threatens her also, Holmes makes Grimesby out. Holmes and Watson take a train to visit Helen. When they meet Helen, they tell him that his father visited them.
Chapter 5. A STRANGE ROOM
Helen recives Holmes and Watson and go to Julia's room. Holmes sees a strange rope en a ventilator, the ventilator connec Julia's and Dr. Grimesby rooms. Holmes make questions from Helen and they go out of the room.
Chapter 6. MORE STRANGE CLUES
Holmes, HEle and Watson go to Roylott's room. He discovers unusual things, like a bowl of milk, a strange stick... Holmes says to Helen that she is in danger and he has got a plan.
Chapter 7. THE SIGNAL
Helen is in danger. Holmes and Watson think of a plan to safe and help Helen. Helen has to do a signal. When Holmes and Watson see the signal, they go her house.
Chapter 8. THE BEAST IN GARDEN
Holmes and Watson go to Helen's house. They climb up to get on a wood plank. Watson hears a strange noise. When they are in the top of the plank, they are surprised with a strange criature.
Capter 9. DANGER IN THE DARK
Holmes and Watson meet a baboon and hit in. They anter in Julia's toom. They wait more than three hours. They see a strange animal nd hit it with a stick. They hear a terrible scream from Roylott's room.
Chapter 10. THE CASE IS CLOSED
Holmes and Watson finds Helen in the door of Dr. Roylott's room. Only Holmes and Watson enter in the room. They see an snake ai the head of the Doctor. Holmes put the snake in the safe. Next day the case is closed and Holmes and Watson go back to London.
