Mothra is a kaiju that first appeared in Toho's 1961 film Mothra. Mothra has appeared in several Toho tokusatsu films, most often as a recurring character in the Godzilla franchise. She is typically portrayed as a colossal sentient larva or imago, accompanied by two miniature female humanoids speaking on her behalf.
In this Ray Harryhausen-esque prequel set during prehistoric times, we'll explore how primitive humans survived against the Titans, humanity's first encounter with Godzilla, and how their relationship with Godzilla was christened.