After Vega attacks many planets with the aim of destroying them and conquering the world, Duke Fleed is forced to flee to Earth with Grendizer, and when Vega attacks Earth, Grendizer quickly confronts him with the help of humans.
After Vega attacks many planets with the aim of destroying them and conquering the world, Duke Fleed is forced to flee to Earth with Grendizer, and when Vega attacks Earth, Grendizer quickly confronts him with the help of humans.