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.

The 1940s. With her husband away fighting Adolf Hitler's Nazis, overworked Isabel Green finds herself caught between a hectic life of tending to the family farm and raising three mutinous children. In desperate need of a helping hand and at the end of her tether, Isabel can't believe her eyes when Nanny McPhee, the extraordinary government nanny, shows up at her front door after the events of Nanny McPhee (2005). As Isabel's scheming brother-in-law, Phil, tries to talk her into selling her half of the farm, the poor mother is going to need all the help she can get. Will a sprinkle of good old magic do the trick once more?—Nick Riganas

A middle-aged female nanny does her best to help a family who is suffering from multiple problems from surviving to living arrangements. Along the way, she learns a lot from the family about what it truly means to be a part of the life of someone and what they do for them.—RECB3