Off the coast of Japan, the environment has been ravaged with poisonous starfish-like creatures called Barem the Elias sisters, Moll and Lora, survey the destruction and enlist the help of three children, who had just discovered and befriended a strange little creature Ghogo" to help find the mysterious treasure of Ninai Kanai, an ancient lost civilization, monster called Dagahra awakened after a sudden increase in pollution levels, then releases a swarm of Barem into the sea, killing many types of sea life leo mothra must to save the Earth from the declining environment