艾莉丝（西尔莎·罗南 Saoirse Ronan 饰）离开了故乡，离开了母亲和姐姐，前往美国寻找更多的机会和更广阔的未来。在神父弗雷德（吉姆·布劳德本特 Jim Broadbent 饰）的帮助下，艾莉丝成为了一名售货员，出色的表现和不懈的努力让她成功获得了主管弗蒂尼（杰西卡·派尔 Jessica Paré 饰）的认可和肯定。之后，艾莉丝结识了名为托尼（艾莫里·科恩 Emory Cohen 饰）男孩，两人之间碰擦出了爱情的火花。 　　一场意外让艾莉丝重回故乡，很快，母亲的种种举动使她察觉，母亲希望自己留在这里，留在她的身边。在母亲的介绍之下，艾莉丝结识了善良的吉姆（多姆纳尔·格里森 Domhnall Gleeson 饰），并且得到了一个很好的工作机会，站在人生的十字路口前，艾莉丝会做出怎样的选择？In late 1951, Eilis Lacey, a young Irish girl, emigrates to Brooklyn. Sponsored by Father Flood, a priest from her native town Enniscorthy, she is assured to find a full-time job there. But the early days are tough, seasickness being soon replaced by loneliness and homesickness, two feelings all the more acutely felt by Eilis for having had to leave behind her widowed mother and her dear sister Rose. She nevertheless little by little manages to find her footing by adapting to her job as a salesgirl, by studying bookkeeping at Brooklyn College as well as with a little help from both Father Flood and Mrs. Kehoe, the owner of the boarding school she now lives in. And not only does graduation follow but love shows its face in Tony, an Italian-American plumber, full of adoration and respect for her. They end up marrying, although keeping the thing secret. It is at that point that tragedy strikes inciting Eilis to return to Enniscorthy to support her mother morally. And there a strange thing happens : she gradually gets lured by the charms of her native place, going as as to let herself be wooed by Jim Farrell, a young local.