Set in an alternate universe in the year 2007-2010 (2049 in the U. S. dub), giant monsters and conquering aliens start to appear, as was foretold by an apocalyptic prophecy about an uncontrollable chaos over the Earth. Facing the threat, the TPC (Terrestrial Peaceable Consortium) is created along with its branch, GUTS (Global Unlimited Task Squad). Through a holographic message in a capsule found by researchers, the GUTS gets knowledge about a golden pyramid built by an ancient civilization. At the site, three statues of a race of giants who defended early human civilization on Earth about 30,000,000 years ago have been unearthed. GUTS finds the three ancient statues, but two of them are destroyed by the monsters Golza and Melba. The third one gains life from the spiritual energy of officer Daigo, descendant of the ancient race. Daigo and the remaining statue merge into a single being, made of light. Shortly after defeating the two monsters, Daigo is revealed by the hologram of the prophecy that 30 million years in the past, a great evil that not even the giants could stop, destroyed the ancient civilization.