The Plot This movie centers around a joint U.S. and Japanese military experiment conducted on a small island off the coast of Japan. The goal is to test a chemical that can convert saltwater into purified, drinkable water — potentially solving global water shortages. However, the military faces strong opposition from the island’s native villagers, who warn that disturbing the lake will awaken O-Baki, an ancient monster said to dwell beneath the surface. In the English version