Joseph Lai Productions

Ambitious uncle kidnaps her own niece so that she passes on her name to the business and estate of her late father. The problem is that the girl has a friend who is a champion of fights. And he's not willing to leave things at all.

"In the borderlands of a wartorn country, a highly lucrative emerald mine becomes the object of unending dispute. Two Ninjas, Byron and Michael were the best of friends while they fought side by side in the Green Berets. However, in the years that have separated them, they have both become the leaders of rival gangs. Now the two face each other in a final battle of brilliant Ninja combat for control of the mine." - VHS Back of the box description. Hong Kong cut and paste edit of the 1983 Thai Film "มรกตดำ" (Black Emerald) with new ninja scenes.