Survivors of a sunken ship have been found on the island of Beru (Ivanto), which was previously used for atomic energy testing. Surprisingly, the interior of the island was not affected by radiation, and they believed that a special juice given to them by the island residents protected them. A joint exploration team of Rolisican and Japanese scientists explored Beiru and discovered many strange things, including two women who were only one foot (30 centimeters) tall. The shameless expedition captain Clark Nelson kidnapped these women and put them in a variety show. But their sweet songs contain a telepathic call for help to Mothra, a giant moth revered by the people of the island. This huge monster followed the women's call and went to Tokyo, causing damage on the way.