Sister Street Fighter, original titled in Japan as On'na Hissatsu-ken, also released in the United Kingdom as Revenge of the Dragon, also released in Germany as Die Karate Tiger is a spin-off of The Street Fighter (1974). The plot revolves around Lǐ Hóng-Lóng, the female martial artist of the title. When her brother Lǐ Wàn-Qīng is kidnapped by drug lords, she seeks revenge. The drug lord's colorful collection of "killers" includes a toga-clad group of Thai Boxers called the "Amazons Seven", along with representatives of almost every martial art. Hóng-Lóng breaks into the drug lord's compound with the help of Seiichi Hibiki (Sonny Chiba) and other members of the Shorinji Kempo dojo. After all of his minions are defeated, the drug lord himself battles Hóng-Lóng, wearing a steel claw in imitation of Han, the villain from Enter the Dragon (1973). This was the first in a trilogy of films. It was followed by Sister Street Fighter: Hanging by a Thread (1974) and The Return of the Sister Street Fighter (1975), each with Shihomi as star.