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The story takes place in a future world where the explosion of human science and technology has greatly consumed the earth's resources and destroyed the natural environment. Human history is facing the danger of decline. At the same time, a group of unknown creatures began to appear, attacking humans and robbing resources, which intensified. During the confrontation, several brave teenagers appeared, using their unique powers to repeatedly repel the ancient beasts, and then embarked on the road to investigate the truth behind the appearance of the ancient beasts. On the other hand, a secret organization with the highest technology uses the most cutting-edge mecha weapons to defeat the ancient beasts time and time again and protect the peace of the place. However, an important clue is discovered during the investigation. As soon as it appears, the root of all problems is related to the ancient book "The Book of Mountains and Rivers" and the ghost city Youdu, so according to the guidance of the ancient book, they go to Youdu, the lair of the ancient beasts, to solve everything. On the way, I met several young people with supernatural powers. It turned out that these young people with supernatural powers also found the same clues, and they experienced and advanced during the trip, greatly increasing their powers. The two groups fought against the ancient beasts as they moved forward, getting closer to the truth step by step. When they arrived in Youdu, they suddenly discovered that everything was a trap set by the "god". They came here to use their powers to unlock the seal of Youdu, release the demons and monsters, reorganize the order of the world, and realize the prophecy of "a cycle of five thousand years".