Nanny McPhee arrives to help a harried young mother who is trying to run the family farm while her husband is away at war, though she uses her magic to teach the woman's children and their two spoiled cousins five new lessons.
Nanny McPhee “There is something you should understand about the way I work. When you need me but do not want me, then I’ll stay. When you want me but no longer need me, then I have to go. It’s rather sad really, but there it is.”