It follows a Japanese-Canadian woman grappling with the death of her mother as she brings her family to a retreat. When her relationship with her husband begins to affect the children's emotional security, the family is forever changed.

It follows a Japanese-Canadian woman grappling with the death of her mother as she brings her family to a retreat. When her relationship with her husband begins to affect the children's emotional security, the family is forever changed.

《海草》是向横光利一的短篇小说《海草》的致敬。女主丽艳多年漂泊在外，在父亲第一年忌日的前一天回到了故乡，剧情围绕丽艳回家的三天两夜展开。丽艳在三姐妹中学识与外貌最好，是父亲的骄傲与希望，但由于婚嫁的选择和父亲的期待相悖，直到父亲去世都没有再回来过。男主忠平的人物心理如《复活 》中聂赫留朵夫引诱玛丝洛娃、《苔丝》中亚历克诱奸苔丝后的赎罪。丽艳的舟车劳顿和突如其来的大病，重新唤起姐妹之间的爱意与善意。 　　这部电影通过娓娓道来的家庭故事，体现了平凡家庭的宽容与爱。导演希望透过这样一部电影，歌颂人性的善意，反思与忏悔、罪与罚以及人和人之间的彼此信任。