Return of the Sister Street Fighter, The

Shurei, a childhood friend of Koryu, disappears. Discovering that she was kidnapped by gangsters, Koryu tries her best to rescue her. However, Koryu has to face the gangsters' henchmen who are experts in karate, boxing, and wrestling. Koryu bravely challenges the gangsters with the help of a female karate fighter Yuriko and a mysterious stranger... (official distributor synopsis)