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。Lancelot lives by the sword. In fact, they're next door neighbours, so teaming up to fight for money comes pretty naturally. Lady Guinevere, on her way to marry King Arthur is ambushed by the evil Sir Malagant. Fortunately Lancelot is lurking nearby and he rescues his future queen. They fall in love, but Guinevere still fancies the idea of wearing a crown, so she honours her promise to Arthur. Can Lady Guinevere remain faithful, or will this Pretty Woman become a lady of the knight?