Old school magic meets the modern world in this epic adventure. Alex (Louis Ashbourne Serkis) thinks he's just another nobody, until he stumbles upon the mythical sword in the stone, Excalibur. Now, he must unite his friends and enemies into a band of knights and, together with the legendary wizard Merlin (Sir Patrick Stewart), take on the wicked enchantress Morgana (Rebecca Ferguson). With the future at stake, Alex must become the great leader he never dreamed he could be.　　剧情讲述一群小朋友探索追踪一个中世纪祸害——名叫Morgana、是亚瑟王同父(母)异母(父)的妹妹的故事。路易斯饰Alex，偶然发现了亚瑟王的圣剑“Excalibur”，泰勒饰他的同伴兰斯洛特，Denise Gough饰他的母亲，Imrie饰年轻版梅林，斯图尔特有望饰演老版梅林，弗格森则有望饰演大反派Morgana。该片由福斯发行，充满动作冒险元素。