Once there was a fire at a place called the riddle house. So the caretaker went to the riddle house and went up the stairs.Then he turned his tourch off and a snake slithered into the room. Then the snake started talking to somone else called wormtail. Then wormtail saw the caretaker and the snake said " get out of my way to get a closer look". Then he said" Avada-Kerdavrer" then the caretaker was dead! Then Hermione woke Harry up for the Quidditch match (a game on brooms).
(if you want to know what happens next see the film or read the book.)