Crazy Bruceploitation. Bruce Li (not Lee of course) plays an anthropologist who goes to New Guinea with his friend to explore the mysterious snake cult tribe. After a number of fights, including against the likes of Bolo Yeung, Bruce goes missing only to re-emerge from the jungle some time later. Back in HK he is a changed man, and seems to be possessed by the snake spirit...
Bruce remembers that he was nursed back to health by Princess Ankawa (Danna) after being poisoned in a fight against the Snake Wizard (Sing Chen)...
The plot is fairly simple and doesn't get in the way of a series of kung fu fights, some of which are pretty decent. However a little more storyline and a little less fighting might have improved the film a bit. The film is a perfect example of the genre: terrible dubbing, odd sound effects and fast editing. It even has a man in a rather unconvincing ape costume! Not terrible but not terribly original either.