A blast of wind, a house-rattling bang, and Mary Poppins arrives at Number Seventeen Cherry Tree Lane. Quicker than she can close her umbrella, she takes charge of the Banks children--Jane, Michael, and the twins--and she changes their lives forever.

Mary Poppins returns to the Banks family in a rocket and involves the Banks children in more magical adventures including those with Peppermint Horses, the Marble Boy, and the Cat that Looked at the King.

Decades after her original visit, the magical nanny returns to help Michael's three children, along with grown-up Jane and Michael Banks, through a difficult period in their lives.