Summary of Mystery on Elm Street in english.

Mike is not going to school because he is sick. He sees from his bedroom window that the abandoned house has a new resident. An old man who wears black clothes.
  His friends visit him and They are happy for it. Mike talks about the strange man in the strange house and they devise a plan: the plan X, in order to find out about the Mr X - his name, profession and friends. Everyone begins the investigation.
  Sylvia is in the drugstore and find the name of Mr X: Mr MacDonald. The children are at Mike's house talking about the investigation: when they hear the brakes of a police car in front of the Mr X's house. Children suspect he is a kidnapper.
  The Children see Sylvia's mother talking to Mr X and solve warn her, believing she is in danger. Sylvia's mother delivers an invitation from Mr X to the children (a call for Alex's birthday). Children are confused: is he a crook? a kidnapper? who is that old man?
On the Alex's birthday, they ask him who is the owner of the black van and who are the couple inside the van, he replies that is his father's van and the couple are their parents.
  Mike asks Mr MacDonald about the shots and the terrible scenes behind the curtain. Mr. MacDonald responds: Your imagination is fantastic, my boy.