3 years after his battle with Godzilla. Kong went back to live in hollow earth. He has adapted quickly and learned about all of the creatures. One day after getting his tooth fixed Kong went back him and he noticed something was off and he sniffed around and smelt something unfamiliar. He moved a giant rock and then grab his battle axe. He noticed a large hole appeared in his hunting grounds then he jump down it seeing crystals and skeleton of creatures that look like his species.