在瓦蓝的世界里，勇气与友谊交织，冒险无尽，梦想绽放。葵花宝典未满年龄确认请离开

　　In an effort to find an economic means of purifying salt water, a joint U.S.-Japanese military command is set up on an isolated Japanese island where an unusual salt water lake is situated. However, their purifying experiments arouse the prehistoric monster Obaki from hibernation at the lake's bottom, and it proceeds to attack Japan.