It starts fast with three guys kill a man and his son finds the body. Next Billy Chong does punches and kicks, he is cut like Bruce Lee and looks like Jackie Chan. He applies for a job as a kung fu teacher and fails the interview. They take him on as a servant. Simon Yuen is in the kitchen. The three murderers come to the school looking for eagle fist style and kick ass but find no eagle fist. Billy observes Simon practicing at night and gets him to be his teacher.
Billy Chong is recognized as one of the greatest in the world of martial arts movies and then "what might have been" is always added to his biography. He appeared in only 11 movies. His first lead was in 1978 "Invincible Monkey Fist" made in Indonesia (his native land) but his breakout lead was 1979 "Sun Dragon" made in America. "Sun Dragon" flopped in America despite excellent fight choreography. I blame it on the English voice dubbing that sounded retarded. Here is his third movie and it totally copies Jackie Chan's "Drunken Master" from a year earlier. I don't blame him at all for copying, it is standard in this business that if it works you beat it to death, and the audience does not complain until it is actually dead.
After that his career was trying to catch up to the prolific volume of martial arts movies released in the late 1970s to early 1980s but before he could find a way to define himself as different it was 1984 and the golden age of martial arts movies suffered sudden death.