A Shaw and Sons film

HK horror film.

Jack Cody has always wanted to enter the world of the Superfights, a free fighting tournament. One night, Jack rescues a girl from a mugging and becomes a national hero. Only then is he given his opportunity to become a Superfighter. Jack soon meets a ninja who informs him that the man behind the Superfights is involved in illegal acts. Armed with this knowledge Jack must fight . . . for his life!

So goes to the U.S. to open a martial arts school. Around this time, many Chinese people were sold off to U.S. railroad companies, and were brutally treated by the Americans under the harsh working conditions. Thus, the American workers' hatred towards the Chinese immigrants is high. As a result, So gets into trouble with the Americans and the mob, and calls Master Wong for help.