A young Chinese all-karate champion, Tze Chiang (Kurata Yasuaki), along with his Japanese wife, arrives home in Shanghai only to find that the situation there has become intolerable. Now, he is a foreigner in his own land due to a Japanese occupation! Tze Chiang soon discovers that his parents have been murdered by a local Marshall, so the military can use the Chiang's family home as a post.