The narrative opens with Anne Shirley bidding farewell to teaching and Green Gables, preparing for her marriage to Gilbert Blythe. They settle in Four Winds Harbor, renting a small white house by the sea, which Anne instantly christens her house of dreams. Surrounded by old friends like Diana Barry and new acquaintances such as the eccentric Miss Cornelia Bryant and the noble, storytelling Captain Jim Boyd, they build a rich and harmonious community life. A central figure in their circle is Leslie Moore, a woman whose profound beauty is shadowed by tragedy, bound to a husband who has lost his reason after suffering a severe brain injury.
Through the shifting seasons of weddings, births, losses, and seaside adventures, Anne and Gilbert navigate the complexities of life and death, finding deep solace in their love and the steadfast beauty of their island home. The arrival of a writer named Owen Ford brings fresh intellectual life to Four Winds, leading him to collaborate with Captain Jim on a life-book that preserves the old sailor's memories and the romantic tale of lost Margaret. The bond between Anne and Leslie deepens through shared sorrow and quiet triumphs, culminating in a renewed sense of resilience as they face the future together.