《无影剑》一部古装武侠片，韩国片名为무영검，英文名为Shadowless Sword，该片由金荣俊导演执导，李瑞镇、尹素怡、申贤俊、李基容等人联合出演，出品公司是韩国泰元娱乐公司、美国新线影业，于2005年11月18日在韩国上映。电影讲述的是3位英雄的故事。国家快要灭亡了，二王子大正贤被流放，延小霞的父母被契丹人杀害了，于是她由秘密组织抚养长大。在秘密组织的培养下，她的武艺越来越高超，于是她被安排去寻找被流放的二王子大正贤。她顺利的找到了二王子，为了保护他，她把无影剑拿出来了。大正贤在流放的日子里，就是靠倒卖偷来的赃物生活。他并不信任延小霞，于是他逃跑了。逃跑中他遇到了刺客。被延小霞救下，通过这次死里逃生，他决定和她一起回去。他们两人是否可以顺利的回到渤海国呢？在回去的路途中他们又会遇到多少困难呢

"Wu Ying Jian" is an ancient costume martial arts film. The Korean title is 무영검, and the English title is Shadowless Sword. , Yoon So-yi, Shin Hyun-joon, Lee Ki-yong and others co-starred. The production company is South Korea's Taewon Entertainment and New Line Pictures of the United States. It was released in Korea on November 18, 2005. The movie tells the story of 3 heroes. The country is about to perish, the second prince Da Zhengxian was exiled, and Yan Xiaoxia's parents were killed by the Khitan people, so she was raised by a secret organization. Under the cultivation of the secret organization, her martial arts became more and more superb, so she was arranged to find the exiled second prince Da Zhengxian. She successfully found the second prince, and in order to protect him, she took out the Shadowless Sword. Da Zhengxian lived in exile by reselling stolen goods. He didn't trust Yan Xiaoxia, so he ran away. While escaping, he met an assassin. Rescued by Yan Xiaoxia, after this narrow escape, he decided to go back with her. Can the two of them return to Bohai State smoothly? How many difficulties will they encounter on the way back