Takeo Nagashima

Kanji Watanabe is a middle-aged man who has worked in the same monotonous bureaucratic position for decades. Learning he has cancer, he starts to look for the meaning of his life.

Shipwreck survivors found on the presumably uninhabited Infant Island leads to a scientific expedition that discovers a surviving native population along with the Shobijin, tiny twin fairy priestesses of the island's mythical deity called Mothra. After the fairies are kidnapped by an exploitative businessman named Clark Nelson, Mothra sets out to rescue them.