Evil with no cure. A warrior with no fear. A beautiful Caribbean island plays host to the World Martial Arts Tournament and the American Ninja is there to compete. But evil is ever close at hand as 'Cobra' the tournament sponsor means to use the winner as a human guinea pig for his terrifying germ warfare program. The American Ninja - Sean - has to expose the Cobra and show he plans to dominate the world. But first he must get the Cobra's highly trained army of ninja warriors. Another all-action adventure in the popular American Ninja series.