The movie "Mothra" follows the story of survivors from a shipwreck who are rescued on Beiru Island (Infanto tô), a site previously used for nuclear testing. Surprisingly, they find no signs of radiation within the island's interior, believing that a special elixir provided by the locals shielded them. A team of scientists from Rolisica and Japan embarks on an expedition to Beiru, unveiling various oddities, such as two tiny women standing only 30 centimeters tall. Greedy leader Clark Nelson captures the women, exploiting them in a circus act. However, the women's melodic voices contain a psychic plea to Mothra, a colossal moth revered as a god by the islanders. Responding to their call, the monstrous creature sets off for Tokyo, leaving a path of chaos in its wake.