Set in Edwardian London, Jane and Michael Banks are two children in a middle class London suburb. Their parents are distant from the children and each nanny they employ leaves in exasperation after the chaos the children cause.
The children's father is a banker who is cold towards them and their mother is too busy with the suffragette movement.They want the perfect nanny and in a sudden gust of wind, Mary Poppins drops by. She possesses magical powers such as a bottomless handbag. Mary Poppins changes the life of the children and also meets up with her friend Bert, the one man band.