The Stone Age Warriors

The story begins with an explorer named Nakamura heading deep into the jungle to find a hidden treasure. But the "treasure" is actually a drug cache guarded by a vicious tribe, and Nakamura is captured. His daughter, Eko heads off to find him, with an insurance investigator in tow. Along the way, they meet Lung Fei, a missionary's son whose kung fu skills come in very handy as they head deeper into the jungle.