Nora has made friends with all the people in her building--almost. Cranky Mrs. Ellsworth, whom Nora has nicknamed Mrs. Mind-Your-Own-Business, just won't be friendly. Then one day Mommy needs a baby-sitter for Nora and Teddy. No one can take the job...except Mrs. Mind-Your-Own-Business! Teddy is scared, but Nora is curious. Will Mrs. Mind-Your-Own-Business become their friend at last?