Anne Shirley is thirteen years old and finds that life in Avonlea is never simple. Anne's bosom friendship with Diana Barry is put to the test when Anne begins to spend more time with Gilbert Blythe. And when Matthew's health begins to slide, he implores Anne to keep it secret because he doesn't want Marilla to worry. Anne struggles with her promise, but in the end, she confesses the truth to Marilla and must then wrestle with the burden of her betrayal to Matthew.
Torn between her free-spirited nature and her own perceived need to become sensible, Anne finds that the journey toward her goal is fraught with confusion and more than a few unfortunate yet amusing mishaps.