Pollyanna (version 4)

Spinster Polly Harrington is perfectly content to be in control of her comfortable life, even if is she alone in a big house. But then a letter arrives informing her she is the guardian to her young orphaned niece, and she as well as the whole town quickly learns that life will never be the same with Pollyanna around to help them count their blessings. - Summary by thestorygirl