http://www.imdb.com/title/tt0354681/
13 yo Sigrid, a shy and timid girl, has an imaginary friend, Mr. Moon, to whom she writes about all of her worries and joys. One day a strange little girl, who claims to be her half-sister she has never met, comes to Sigrid. She says that Sigrid must help to save their grandma from the home of aged people. Finally they succeed in their mission, but new problems arise. They are confronted by drunkers who try to blackmail them. After all kinds of humorous and somewhat dangerous incidents, the story has a happy end.
[Image]