讲述1990年代早期关键性的一个周末，戴安娜下了决心：她跟查尔斯王子的婚姻不会有好结果，必须背离那条“皇后预备役”的道路。影片故事发生在3天内，圣诞假日期间的桑德灵汉姆庄园。

In the late 1930s, civil war grips Spain. When General Franco and his Fascists succeed in overthrowing the government, hundreds of thousands are forced to flee in a treacherous journey over the mountains to the French border. Among them is Roser, a pregnant young widow, who finds her life intertwined with that of Victor Dalmau, an army doctor and the brother of her deceased love. In order to survive, the two must unite in a marriage neither of them desires.
Together with two thousand other refugees, they embark on the SS Winnipeg, a ship chartered by the poet Pablo Neruda, to Chile: “the long petal of sea and wine and snow.” As unlikely partners, they embrace exile as the rest of Europe erupts in world war. Starting over on a new continent, their trials are just beginning, and over the course of their lives, they will face trial after trial. But they will also find joy as they patiently await the day when they will be exiles no more. Through it all, their hope of returning to Spain keeps them going. Destined to witness the battle between freedom and repression as it plays out across the world, Roser and Victor will find that home might have been closer than they thought all along.
A masterful work of historical fiction about hope, exile, and belonging, A Long Petal of the Sea shows Isabel Allende at the height of her powers.