Inspired loosely by Shakespeare's Twelfth Night, teenaged Violet is shipped off to Maine after her brother's hospitalization, where she searches for the lost shipwreck that her great-great grandmother survived and for answers about her family's long struggle with mental illness, all while falling in love.

Rosa Santos, a Cuban American, works to save her Florida town, seeks admittance to study abroad in her homeland, and wonders if love can break her family's curse.

In October, 1947, after a summer-long drought, fires began near Bar Harbor and raced along the coast of Maine, ravaging two hundred thousand acres--the largest fire in Maine's history. In the southern part of the state, people were forced into the sea to escape the flames. Five months pregnant, Grace Holland is left alone to protect her two toddlers when her husband Gene joins the volunteers fighting to bring the fire under control. Along with her best friend, Rosie, and Rosie's two young children, the women watch in horror as their houses go up in flames, then walk into the ocean as a last resort. They spend the night frantically trying to save their children. When dawn comes, they have miraculously survived, but their lives are forever changed: homeless, penniless, and left to face an uncertain future in a town that no longer exists.

The women of the Waverley family -- whether they like it or not -- are heirs to an unusual legacy, one that grows in a fenced plot behind their Queen Anne home on Pendland Street in Bascom, North Carolina. There, an apple tree bearing fruit of magical properties looms over a garden filled with herbs and edible flowers that possess the power to affect in curious ways anyone who eats them.

Rose, nearly sixteen, is used to traveling around with her alcoholic father but connects with the people of a small, coastal Australian town, especially classmate Pearl and reclusive Edie, who teaches her to sew a magical dress for the Harvest Festival while a mystery unfolds around them.