After Mary Poppins departed London, Jane and Michael Banks grew up into loving and responsible adults. When Michael becomes a single father of three children after the death of his wife, Mary Poppins revisits the Cherry Tree Lane home again to try to help Michael and his family cope and move beyond their grief. Time passes quickly for most normal mortals. Mary Poppins has never been normal. Although it's now the 1930s, she looks exactly the same....

A young orphan, Oliver is left to fend for himself until he is befriended by a band of young thieves who quickly train him in their craft. But Oliver is not content to be a thief for he knows that life holds great joys and true happiness cannot be stolen, but must be earned.