When Nanny McPhee appears at the farmhouse door of a busy young mother Isabel Green, she discovers that Mrs. Green's children are in an all-out household war with their two spoiled city cousins. Relying on everything from a flying motorcycle and a statue that comes to life to a tree-climbing piglet and an elephant that turns up in the oddest places, Nanny McPhee uses her magic to show the children five valuable lessons, the most important of which...

Roddy is a decidedly upper-crust "society mouse" who lives the life of a pampered pet in a posh Kensington flat. When a sewer rat named Sid comes out of the sink, he decides he had hit the jackpot. Roddy schemes to rid himself of Sid by luring him into the "whirlpool". Sid may be an ignorant slob, but he's no fool, but it is Roddy who winds up being flushed away into the bustling sewer world of Ratopolis.

The girls are sent to Switzelvania by The Ellen DeGeneres Show as special correspondents tasked with covering the coronation of a new queen. Once there, they encounter three very different princesses competing for the throne. Together, the girls hatch a royal plot to help the best candidate win.