The emperor's wife is murdered and Inspector Cool Head (Kuan Tai Chen) is tasked with finding the killer. The murder weapon is found and a suspect is apprehended, but Cool Head soon senses foul play. The accused's sword-wielding sisters (led by Judy Lee) fight to clear his name and soon join the inspector in the investigation. Not to be confused as the sequel to 1977's smash-hit Iron Monkey, this kung-fu flick still packs plenty of righteous beat-downs.