In a dystopian future, Earth faces a colossal threat when a group of extraterrestrials, led by the enigmatic and malevolent Gigan, decides to invade the planet with the intention of making it their new home. These alien beings, possessing advanced technology, have destroyed numerous civilizations throughout the galaxy, and now they have humanity in their sights. However, they did not anticipate the emergence of an unexpected ally.
As the extraterrestrials unleash their attack, the population is left desperate and plunged into chaos. Amid this crisis, scientists discover that humanity's only hope of defense lies in an ancient monster, known for its ferocity and destructive power: Godzilla. Summoning the legendary creature, humanity cries out for its help to confront the looming threat.
In an impressive battle between titans, Godzilla faces not only Gigan but also other monsters that have been unleashed by the invaders. In an epic clash that combines special effects of the era with a plot filled with unexpected twists, the protagonists must find a way to help Godzilla defeat Gigan and his alien cronies, while the fate of Earth hangs in the balance. Will they be able to save their home from total destruction, or will the aliens' domination be inevitable?