In order to find his missing uncle, the young man designed his own geocentric exploration ship, but it was plagiarized. As a result, he had to accept the truth because the businessman promised to let him lead the team to find the lost civilization. However, the merchant has a mysterious fragment in his hand, and if he finds the rest, he can have great power. Another part of the legend is in the center of the earth, where there is also a world, so he sponsored some scientists to go to the center of the earth to do scientific research, in fact, in order to realize his ambition, the scientists took a spaceship with a big drill invented by young people to the center of the earth, where they found primitive people. Through their murals, we know that their ancestors entered the center of the earth along the crater from the ground, and they made friends with white humanoid monsters. However, there is another one here with many catheters, the evil ruler with green liquid flowing in the pipe, and the whole inner world is controlled by him.