一部关于亚瑟王 石中剑的史诗般电影，讲述 巫师梅林（尼科尔‧威廉森 Nicol Williamson 饰）赐予了亚瑟王（尼吉尔‧特瑞 Nigel Terry 饰）一把充满了魔力的神剑，在临终之前，亚瑟王将这把神剑插入了巨石之中，他立下遗嘱，若是有谁能够将神剑从石头中拔出，便可以获得成为英国国王的资格。 一晃眼数年过去，亚瑟王的私生子站在了巨石面前，顺理成章的拔出了神剑继承了王位，成为了新一代的亚瑟王。之后，他迎娶了名为昆妮弗（切瑞‧朗西 Cherie Lunghi 饰）的女子为妻，并且创立了圆桌骑士组织，开创了历史上最辉煌的时代。然而 好景不长，昆妮弗爱上了圆桌骑士兰斯洛特（尼古拉斯‧克莱 Nicholas Clay 饰），与此同时，家族中爆发的丑闻领国王的统治岌岌可危。
圆桌武士兰思洛一次在森林中意外营救了亚瑟王的未婚妻Guinevere，两人虽一见钟情，但碍于Guinevere早已是亚瑟王的未婚妻，所以只好无奈地将他婉拒。后来亚瑟王揭发了他们两人的恋情，在痛心之余，亚瑟王决定要公审他们，不过此时亚瑟王却受到敌人的大举入侵，全国人民束手无策，兰思洛见势立刻拔刀相助，拯救亚瑟王于危难中。
This story is set in the 13th century, in Britain, where Lancelot, who was raised by Vivian, the Lady of the Lake, becomes one the Knight of the Round Tables and falls secretly in love with Guinevere, the wife of King Arthur, for whom he wants to accomplish many deeds.
私生子莫德雷德谋夺王位的阴谋以及吉娜维尔对兰斯洛特爵士的日益依恋，威胁着亚瑟国王的统治，并可能摧毁他的“圆桌骑士团”。
Classic tale of King Arthur and how his wife is kidnapped by his evil sister. Lancelot is sent out to try and retrieve the lost queen and unfortunately falls in love with her. Forbidden love, revenge, family rivalry, and magic are all prominent themes.
故事发生在寻找圣杯的最后几天，当亚瑟王的武士们策马穿过一片充满黑暗、险象环生的丛林，一无所获回到卡默洛特（亚瑟王的宫殿）后，他们的队伍被解散，士气顿失。在他们中间，一位名为兰斯洛特的武士，对此次失败感到深深自责。他认为正是他和格温娜维尔皇后的偷情摧毁了这次神圣的使命。失败的阴影笼罩着一切，辉煌华丽的宫廷呈现出一个即将结束的年代的衰败气象。
As border wars break out in Camelot, the young princess Guinevere is taken to live in safety with the High Priestess L'Fei. When King Arthur claims the crown, Guinevere is promised to him and she must leave her true love, Prince Lancelot in order to unite the land. In a tale of honor, loyalty and the price of war, Guinevere is forced to choose between the only man she has ever loved and her duty to her kingdom.
Shot live from the Winter Garden Theatre in New York City, this presentation of the 1980 Broadway revival of the beloved Lerner & Loewe classic follows King Arthur, who founds the kingdom of Camelot and the Knights of the Round Table. Their goal: fight for justice and right, but Arthur only sees his ideal crumble when his wife Guenevere falls in love with his favorite knight, Sir Lancelot.