A family of four move in to a flat . In the family. His a young girl with blond hair .and a teenage boy with brown hair .the girl his playing with a ball when this creature comes and transforms it self in to her.her older brother knows its not his sister .the creature gose round the other flats killing people there's a dwarf that lives in one of the flats .in the end the brother rescues the girl from a forest . Please help me remember the name of the film
