With the reveal of Atlantis to the surface world, the humans of Earth have begun to question their knowledge of this planet. How could an entire civilisation have existed right under their noses for thousands of years without them knowing? But with Atlantis being sunk back beneath the waves following the battle, no studies can be performed and their technology remains lost.
This has sparked a new age of exploration, as the IKDC has been tasked with exploring the Hollow Earth once and for all to find out what else has been hiding within their planet. Teaming up with Apex Cybernetics, Monarch, and reluctantly Agari Industries, the secrets of this planet are sure to be revealed...
On the other hand, it seems that mankind has underestimated the Kaiju. Perhaps they are not mindless monsters as they may have first seemed. With Godzilla and his allies defeating the threat from below the waves, all has become quiet, and Godzilla has taken time to spend with his family and repair the bonds that had been broken following Ghidorah's revival.
And yet it seems that the Hollow Earth remains to be a centre piece in all of the world's problems. Despite the old rivalries between the Gojira and the Apes having been long over, it seems that some grudges can simply never be given up. A new threat has long been slumbering within the ruined Kingdoms of old lost to the Earth's depths... and all it takes is one individual to disrupt the fragile peace.
New sparks threaten to reignite an old and long forgotten war. Should a new war start... it will shake the Earth from the inside out...