A young child is stranded in Tonga when his plane crashes and his father is eaten by a fish. He trains in a dojo till he becomes the Tongan Ninja. The Tongan Ninja is dispatched to the island nation of New Zealand in order to help a brother of his master with his floundering Chinese restaurant. But the mysterious Mister Big stands in the eatery's way as he sends numerous villains such as Knife Man, Gun Man, and the super-sexy Action Fighter who may know a lot about the hero.