Anne must deal with the inevitability of womanhood when she gets her first period. At the same time, Marilla and Matthew acclimatize to parenthood and revisit moments of their youth through Anne.
When her little sister becomes ill, Diana runs to Anne for help. Meanwhile, the Blythe farm sees change, as Marilla is reminded of what she gave up and Matthew receives some unsettling news.
As Anne's sixteenth birthday approaches, she finds herself longing to know more about her lineage, which strains her relationship with Matthew and Marilla.
Matthew permits Anne to continue her search, despite Marilla's misgivings. Ka'kwet says goodbye to her old life, but finds her new one is not what she imagined.
The school kids practice for the upcoming barn dance, bringing romantic anxieties to a head. The girls are plagued with fears about marriage and motherhood.
Avonlea hosts the Island County Fair, which brings romance, heartbreak, competition, and disaster. Matthew goes head to head with an old friend, while Jerry seizes a unique opportunity.
After a shocking act of violence, Oqwatnuk and Aluk call upon the Cuthberts for help. Anne is forced to confront harsh truths. Gilbert makes a decision about his future.