Mantis fists & tiger claws of shaolin (1977)

When the local thugs harass a restaurant owner's daughter, Shuang Shuang, a mysterious stranger named Yung Feng fends them off. While Yung Feng is off to the local brothel to find his long lost sister, Shuang Shuang gets sexually assaulted by the thugs, who are later killed by something hiding in the woods. The father of the thugs, Hung Chun Piao, believes that Yung Feng committed the murders, and confronts him...